Columbia subject headings:
Oldenburg (Germany : Landkreis)--Genealogy.
Registers of births, etc.--Germany--Oldenburg.
Social classes--Germany--Oldenburg.
Harvard subject headings:
Oldenburg (Germany)--Genealogy.
Registers of births, etc.--Germany--Oldenburg.
Social classes--Germany--Oldenburg.
Princeton subject headings:
Oldenburg (Germany)--Genealogy.
Registers of births, etc.--Germany--Oldenburg.
Social classes--Germany--Oldenburg.