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What are ISSN, ISBN and OCLC numbers, and do I need to have them?

April 26, 2017ISBN ISSN Numbers OCLC

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What are ISSN, ISBN and OCLC numbers, and do I need to have them?

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The ISSN is an 8 digit number that uniquely identifies a particular magazine or journal. The ISBN is a 10 or 13 digit number that uniquely identifies a particular book. The OCLC Accession number is found at the end of a WorldCat record. These are not required fields, but do speed up processing of requests if they are included.