Columbia subject headings:
Germany--Maps--Bibliography--Catalogs.
Königsberger Staatsarchiv--Catalogs.
Prussia, East (Poland and Russia)--Maps--Bibliography--Catalogs.
Harvard subject headings:
Germany--Maps--Bibliography--Catalogs.
Königsberger Staatsarchiv--Catalogs.
Prussia, East (Poland and Russia)--Maps--Bibliography--Catalogs.
Princeton subject headings:
Germany--Maps--Bibliography--Catalogs.
Königsberger Staatsarchiv--Catalogs.
Prussia, East (Poland and Russia)--Maps--Bibliography--Catalogs.