Columbia subject headings:
Harvard subject headings:
Geographical perception--Congresses.
Human geography--Congresses
Human territoriality--Congresses.
National characteristics, German--Congresses.
National characteristics--Congresses.
Regionalism--Congresses
Princeton subject headings:
Geographical perception--Congresses.
Human geography--Congresses.
Human territoriality--Congresses.
National characteristics, German--Congresses.
National characteristics--Congresses.
Regionalism--Congresses.