Amtliche Druckschriftennummer
engl.: Government publication number Pica+ 007B$0 Pica3 2225 MAB 550 MARC21 074 Gpo Item Number (R) Subfields: $a GPO item number $z Cancelled/invalid GPO item number (R) UNIMARC 022 Subfields: $a Country code (ISO 3166) $b Government publication number $z Erroneous number