Columbia subject headings:
Archives--Germany--Baden-Württemberg--Bibliography.
Baden-Württemberg (Germany)--History--Sources--Bibliography.
Schaumburg family--Archives--Catalogs.
Harvard subject headings:
Archives--Germany--Baden-Württemberg--Bibliography.
Baden-Württemberg (Germany)--History--Sources--Bibliography.
Oberkirch (Germany)--History--Sources.
Schaumburg family--Archives--Catalogs.
Princeton subject headings: