Amtsdrucksachen-Klassifikation
        engl.: Government document call number; SUDOC number]
               
               
               
               
MARC21       086     Government Document Classification Number (R)
  Subfields: 
             $a   Classification number
             $z   Cancelled/invalid classification number (R)
             $2   Number source
             $6   Linkage

 Indic/etc.: 1st: Number source
             # Source specified in subfield $2
             # Undefined (BK MP MU VM SE) [obs.]
             0 Superintendent of Documents Classification System Assigned by the U.S
             Government Printing Office. Supt. of Docs. no. may be generated.
             1 Government of Canada Publications: Outline of Classification