Document identifiers: ISBN and ISSN

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International Standard Book Number (ISBN)

A unique, universal identification number assigned to each commercially published book. In Spain, ISBNs are issued by the national ISBN Agency.

International Standard Serial Number (ISSN)

Issn-barcode-explained An internationally accepted, univocal identification number for periodical publications (journals, newsletters, yearbooks, series of monographs, etc.).


  • Who can request an ISSN? Publishers, printers, distributors, subscription agencies, booksellers, libraries, documentation centres, and indexing and abstracting services.  
  • How can I get an ISSN? Complete a form online or apply via post.
  • Further information