Columbia subject headings:
Harvard subject headings:
Art, Modern--Congresses.
Germany--Politics and government--1871-1933--Congresses.
Rathenau, Walther, 1867-1922--Congresses.
Princeton subject headings:
Art, Modern--Congresses.
Germany--Politics and government--1871-1933--Congresses.
Rathenau, Walther, 1867-1922--Congresses.