diff --git a/tests/Mods/ModsReaderTest.php b/tests/Mods/ModsReaderTest.php
index 346f066..5da6d37 100644
--- a/tests/Mods/ModsReaderTest.php
+++ b/tests/Mods/ModsReaderTest.php
@@ -833,11 +833,22 @@ public function testGetRecordInfosForBookDocument()
         self::assertNotEmpty($recordInfos);
         self::assertEquals(1, count($recordInfos));
         self::assertNotEmpty($recordInfos[0]->getValue());
-        //self::assertEquals('', $recordInfos[0]->getRecordIdentifier());
-        //self::assertNotEmpty($recordInfos[0]->getRecordOrigin());
-        //self::assertNotEmpty($recordInfos[0]->getLanguageOfCataloging());
-
-        // TODO: implement reading of elements
+        self::assertNotEmpty($recordInfos[0]->getDescriptionStandards());
+        self::assertEquals('aacr', $recordInfos[0]->getDescriptionStandards()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordContentSources());
+        self::assertEquals('marcorg', $recordInfos[0]->getRecordContentSources()[0]->getAuthority());
+        self::assertEquals('DLC', $recordInfos[0]->getRecordContentSources()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordCreationDates());
+        self::assertEquals('marc', $recordInfos[0]->getRecordCreationDates()[0]->getEncoding());
+        self::assertEquals('990730', $recordInfos[0]->getRecordCreationDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordChangeDates());
+        self::assertEquals('iso8601', $recordInfos[0]->getRecordChangeDates()[0]->getEncoding());
+        self::assertEquals('20060801143536.0', $recordInfos[0]->getRecordChangeDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordIdentifiers());
+        self::assertEquals('DE-14', $recordInfos[0]->getRecordIdentifiers()[0]->getSource());
+        self::assertEquals('11761548', $recordInfos[0]->getRecordIdentifiers()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordOrigins());
+        self::assertStringContainsString('Converted from MARCXML to MODS', $recordInfos[0]->getRecordOrigins()[0]->getValue());
     }
 
     public function testGetRecordInfosByQueryForBookDocument()
@@ -846,11 +857,22 @@ public function testGetRecordInfosByQueryForBookDocument()
         self::assertNotEmpty($recordInfos);
         self::assertEquals(1, count($recordInfos));
         self::assertNotEmpty($recordInfos[0]->getValue());
-        //self::assertEquals('', $recordInfos[0]->getRecordIdentifier());
-        //self::assertNotEmpty($recordInfos[0]->getRecordOrigin());
-        //self::assertNotEmpty($recordInfos[0]->getLanguageOfCataloging());
-
-        // TODO: implement reading of elements
+        self::assertNotEmpty($recordInfos[0]->getDescriptionStandards());
+        self::assertEquals('aacr', $recordInfos[0]->getDescriptionStandards()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordContentSources());
+        self::assertEquals('marcorg', $recordInfos[0]->getRecordContentSources()[0]->getAuthority());
+        self::assertEquals('DLC', $recordInfos[0]->getRecordContentSources()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordCreationDates());
+        self::assertEquals('marc', $recordInfos[0]->getRecordCreationDates()[0]->getEncoding());
+        self::assertEquals('990730', $recordInfos[0]->getRecordCreationDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordChangeDates());
+        self::assertEquals('iso8601', $recordInfos[0]->getRecordChangeDates()[0]->getEncoding());
+        self::assertEquals('20060801143536.0', $recordInfos[0]->getRecordChangeDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordIdentifiers());
+        self::assertEquals('DE-14', $recordInfos[0]->getRecordIdentifiers()[0]->getSource());
+        self::assertEquals('11761548', $recordInfos[0]->getRecordIdentifiers()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordOrigins());
+        self::assertStringContainsString('Converted from MARCXML to MODS', $recordInfos[0]->getRecordOrigins()[0]->getValue());
     }
 
     public function testGetNoRecordInfosByQueryForBookDocument()
@@ -865,11 +887,33 @@ public function testGetRecordInfosForSerialDocument()
         self::assertNotEmpty($recordInfos);
         self::assertEquals(1, count($recordInfos));
         self::assertNotEmpty($recordInfos[0]->getValue());
-        //self::assertEquals('', $recordInfos[0]->getRecordIdentifier());
-        //self::assertNotEmpty($recordInfos[0]->getRecordOrigin());
-        //self::assertNotEmpty($recordInfos[0]->getLanguageOfCataloging());
-
-        // TODO: implement reading of elements
+        self::assertNotEmpty($recordInfos[0]->getDescriptionStandards());
+        self::assertEquals('aacr', $recordInfos[0]->getDescriptionStandards()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordContentSources());
+        self::assertEquals('marcorg', $recordInfos[0]->getRecordContentSources()[0]->getAuthority());
+        self::assertEquals('NLC', $recordInfos[0]->getRecordContentSources()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordCreationDates());
+        self::assertEquals('marc', $recordInfos[0]->getRecordCreationDates()[0]->getEncoding());
+        self::assertEquals('021127', $recordInfos[0]->getRecordCreationDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordChangeDates());
+        self::assertEquals('iso8601', $recordInfos[0]->getRecordChangeDates()[0]->getEncoding());
+        self::assertEquals('20080910160139.0', $recordInfos[0]->getRecordChangeDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordIdentifiers());
+        self::assertEquals('15446420', $recordInfos[0]->getRecordIdentifiers()[0]->getValue());
+        self::assertStringContainsString('Converted from MARCXML to MODS', $recordInfos[0]->getRecordOrigins()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordInfoNotes());
+        self::assertEquals(2, count($recordInfos[0]->getRecordInfoNotes()));
+        self::assertEquals('Some info', $recordInfos[0]->getRecordInfoNotes()[1]->getValue());
+        $languages = $recordInfos[0]->getLanguageOfCatalogings();
+        self::assertNotEmpty($languages);
+        self::assertNotNull($languages[0]->getLanguageTerm());
+        self::assertEquals('code', $languages[0]->getLanguageTerm()->getType());
+        self::assertEquals('iso639-2b', $languages[0]->getLanguageTerm()->getAuthority());
+        self::assertEquals('eng', $languages[0]->getLanguageTerm()->getValue());
+        self::assertNotNull($languages[0]->getScriptTerm());
+        self::assertEquals('code', $languages[0]->getScriptTerm()->getType());
+        self::assertEquals('iso15924', $languages[0]->getScriptTerm()->getAuthority());
+        self::assertEquals('Latn', $languages[0]->getScriptTerm()->getValue());
     }
 
     public function testGetRecordInfosByQueryForSerialDocument()
@@ -878,11 +922,33 @@ public function testGetRecordInfosByQueryForSerialDocument()
         self::assertNotEmpty($recordInfos);
         self::assertEquals(1, count($recordInfos));
         self::assertNotEmpty($recordInfos[0]->getValue());
-        //self::assertEquals('', $recordInfos[0]->getRecordIdentifier());
-        //self::assertNotEmpty($recordInfos[0]->getRecordOrigin());
-        //self::assertNotEmpty($recordInfos[0]->getLanguageOfCataloging());
-
-        // TODO: implement reading of elements
+        self::assertNotEmpty($recordInfos[0]->getDescriptionStandards());
+        self::assertEquals('aacr', $recordInfos[0]->getDescriptionStandards()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordContentSources());
+        self::assertEquals('marcorg', $recordInfos[0]->getRecordContentSources()[0]->getAuthority());
+        self::assertEquals('NLC', $recordInfos[0]->getRecordContentSources()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordCreationDates());
+        self::assertEquals('marc', $recordInfos[0]->getRecordCreationDates()[0]->getEncoding());
+        self::assertEquals('021127', $recordInfos[0]->getRecordCreationDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordChangeDates());
+        self::assertEquals('iso8601', $recordInfos[0]->getRecordChangeDates()[0]->getEncoding());
+        self::assertEquals('20080910160139.0', $recordInfos[0]->getRecordChangeDates()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordIdentifiers());
+        self::assertEquals('15446420', $recordInfos[0]->getRecordIdentifiers()[0]->getValue());
+        self::assertStringContainsString('Converted from MARCXML to MODS', $recordInfos[0]->getRecordOrigins()[0]->getValue());
+        self::assertNotEmpty($recordInfos[0]->getRecordInfoNotes());
+        self::assertEquals(2, count($recordInfos[0]->getRecordInfoNotes()));
+        self::assertEquals('Some info', $recordInfos[0]->getRecordInfoNotes()[1]->getValue());
+        $languages = $recordInfos[0]->getLanguageOfCatalogings();
+        self::assertNotEmpty($languages);
+        self::assertNotNull($languages[0]->getLanguageTerm());
+        self::assertEquals('code', $languages[0]->getLanguageTerm()->getType());
+        self::assertEquals('iso639-2b', $languages[0]->getLanguageTerm()->getAuthority());
+        self::assertEquals('eng', $languages[0]->getLanguageTerm()->getValue());
+        self::assertNotNull($languages[0]->getScriptTerm());
+        self::assertEquals('code', $languages[0]->getScriptTerm()->getType());
+        self::assertEquals('iso15924', $languages[0]->getScriptTerm()->getAuthority());
+        self::assertEquals('Latn', $languages[0]->getScriptTerm()->getValue());
     }
 
     public function testGetNoRecordInfosByQueryForSerialDocument()
diff --git a/tests/resources/mods_book.xml b/tests/resources/mods_book.xml
index a656b47..92f56d7 100644
--- a/tests/resources/mods_book.xml
+++ b/tests/resources/mods_book.xml
@@ -153,8 +153,7 @@
         <recordContentSource authority="marcorg">DLC</recordContentSource>
         <recordCreationDate encoding="marc">990730</recordCreationDate>
         <recordChangeDate encoding="iso8601">20060801143536.0</recordChangeDate>
-        <recordIdentifier>11761548</recordIdentifier>
-        <recordOrigin>Converted from MARCXML to MODS version 3.8 using MARC21slim2MODS3-8_XSLT1-0.xsl
-				(Revision 1.172 20230208)</recordOrigin>
+        <recordIdentifier source="DE-14">11761548</recordIdentifier>
+        <recordOrigin>Converted from MARCXML to MODS version 3.8 using MARC21slim2MODS3-8_XSLT1-0.xsl (Revision 1.172 20230208)</recordOrigin>
     </recordInfo>
 </mods>
diff --git a/tests/resources/mods_serial.xml b/tests/resources/mods_serial.xml
index 60ee312..58d3949 100644
--- a/tests/resources/mods_serial.xml
+++ b/tests/resources/mods_serial.xml
@@ -105,10 +105,12 @@
         <recordCreationDate encoding="marc">021127</recordCreationDate>
         <recordChangeDate encoding="iso8601">20080910160139.0</recordChangeDate>
         <recordIdentifier>15446420</recordIdentifier>
-        <recordOrigin>Converted from MARCXML to MODS version 3.8 using MARC21slim2MODS3-8_XSLT1-0.xsl
-				(Revision 1.172 20230208)</recordOrigin>
+        <recordOrigin>Converted from MARCXML to MODS version 3.8 using MARC21slim2MODS3-8_XSLT1-0.xsl (Revision 1.172 20230208)</recordOrigin>
+        <recordInfoNote>Random note</recordInfoNote>
+        <recordInfoNote>Some info</recordInfoNote>
         <languageOfCataloging>
-            <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
+            <languageTerm type="code" authority="iso639-2b">eng</languageTerm>
+            <scriptTerm type="code" authority="iso15924">Latn</scriptTerm>
         </languageOfCataloging>
     </recordInfo>
 </mods>