Columbia subject headings:
Limes (Roman boundary)--Dictionaries--German.
Rome--Boundaries--Dictionaries--German.
Harvard subject headings:
Limes (Roman boundary)--Dictionaries--German.
Rome--Boundaries--Dictionaries--German.
Princeton subject headings:
Dictionaries.
Limes (Roman boundary)--Dictionaries--German.
Rome--Boundaries--Dictionaries--German.