Columbia subject headings:
Harvard subject headings:
Brüning, Heinrich, 1885-1970.
Germany--History--1918-1933--Sources.
Germany--Politics and government--1918-1933--Sources.
Princeton subject headings:
Brüning, Heinrich, 1885-1970.
Germany--History--1918-1933--Sources.
Germany--Politics and government--1918-1933.