Columbia subject headings:
Harvard subject headings:
German Americans--Bibliography.
German Americans--Catalogs.
German Americans--Genealogy
German Americans--Pennsylvania--Bibliography.
Pennsylvania German Folklore Society--Bibliography.
Pennsylvania-German Society--Bibliography.
Princeton subject headings:
Catalogs.
German Americans--Bibliography.
German Americans--Catalogs.
German Americans--Genealogy.
German Americans--Pennsylvania--Bibliography.
Pennsylvania German Folklore Society--Bibliography.
Pennsylvania-German Society--Bibliography.