Columbia subject headings:
Architecture--Germany--Oldenburg (Landkreis)--Guidebooks.
Historic buildings--Germany--Oldenburg (Landkreis)--Guidebooks.
Monuments--Germany--Oldenburg (Landkreis)--Guidebooks.
Oldenburg (Germany : Landkreis)--Guidebooks.
Harvard subject headings:
Architecture--Germany--Oldenburg (Landkreis)--Guidebooks.
Historic buildings--Germany--Oldenburg (Landkreis)--Guidebooks.
Monuments--Germany--Oldenburg (Landkreis)--Guidebooks.
Oldenburg (Germany : Landkreis)--Guidebooks.
Princeton subject headings: