Columbia subject headings:
Harvard subject headings:
Cartography--Congresses
Cartography--Exhibitions
Earth sciences--History--Congresses.
Earth sciences--History--Exhibitions.
Physical geography--Congresses.
Physical geography--Exhibitions.
Wegener, Alfred, 1880-1930--Congresses.
Wegener, Alfred, 1880-1930--Exhibitions.
Princeton subject headings:
Cartography--Congresses.
Cartography--Exhibitions.
Earth sciences--History--Congresses.
Earth sciences--History--Exhibitions.
Physical geography--Congresses.
Physical geography--Exhibitions.
Wegener, Alfred, 1880-1930--Congresses.
Wegener, Alfred, 1880-1930--Exhibitions.