Columbia subject headings:
Harvard subject headings:
Art--Terminology
Castles--Dictionaries--French.
Castles--Dictionaries--German.
Fortification--Dictionaries--French.
Fortification--Dictionaries--German.
French language--Dictionaries--German.
German language--Dictionaries--French.
Military architecture--Dictionaries--German.
Princeton subject headings:
Castles--Dictionaries--German.
Military architecture--Dictionaries--German.