Columbia subject headings:
Harvard subject headings:
Beckum (Warendorf, Germany)--History--Sources.
Beckum (Warendorf, Germany)--Population--Sources.
Law--Germany--Beckum (Warendorf)--History--Sources.
Princeton subject headings:
Beckum (Warendorf, Germany)--Genealogy.
Beckum (Warendorf, Germany)--Politics and government--Sources.