Code 520 - Former title (serials) (R)Indicator 1: Title Significance Indicator 0 Former title is not significant 1 Former title is significant Indicator 2: blankSubfield Codes $a Former Title Proper (Not repeatable) $e Other Title Information (Repeatable) $h Number of Part (Not repeatable) $i Name of Part (Not repeatable) $j Volumes or Dates of Former Title (Not repeatable) $n Miscellaneous Information (Not repeatable) $x ISSN of Former Title (Not repeatable)