Used by Dag Hammarskjöld Library to record a statement on the location
of the holdings record for a recurrent publication.
594 $a Holdings recorded in Non-Governmental Serials Checklist.
594 $a Retention: latest 2 years.
594 $a Holdings recorded in Governmental Serials Checklist.
594 $a Retention: Latest 5 years.
594 $a Holdings recorded in Inter-Governmental Serials Checklist.
August 2005, the "Retrospective conversion (mm/yy)" note was recorded in field 594. The current UNBIS policy is to record such information in tag 596 Local UNBIS Note].
596 $a Retrospective conversion (mm/yy).