76X-78X Subfield $x - International Standard Serial Number:

Subfield $x contains the International Standard Serial Number (ISSN) for a serial title from field 022 (International Standard Serial Number) in the related record. (The ISSN is an agency-assigned data element . ISSNs are assigned to serial publications by national centers under the auspices of the ISSN Network.)

Note: The initialism ISSN that precedes the number is not carried in the MARC record. It may be system generated as a display constant associated with the presence of subfield $x.

Example:

245 00$aAnnual law review$cUniversity of Western Australia.

785 00$tUniversity of Western Australia law review$x0042-0328$w(OCoLC)1587621