022 Subfield $m - Canceled ISSN-L:

Subfield $m contains a canceled ISSN-L that has been associated with the resource.  Each canceled ISSN-L is contained in a separate subfield $m.

ISSN-L (canceled) may be generated for display.

Example:

022  ##  $a1560-1560$l1234-1231$m1560-1560