Columbia subject headings:
German language--Bibliography.
German literature--Bibliography.
Germany--Civilization--Bibliography.
Library science--Research--Handbooks, manuals, etc.
Harvard subject headings:
German philology--Bibliography.
German philology--Research.
Germany--Civilization--Bibliography.
Germany--Civilization--Research.
Princeton subject headings:
German philology--Bibliography.
German philology--Research.
Germany--Civilization--Bibliography.
Germany--Civilization--Research.