- Social classes--Germany--History--Addresses, essays, lectures (3)
- Social conflict--Addresses, essays, lectures (3)
- Social classes--Germany (2)
- Social classes--Germany--History (2)
- Cost and standard of living--Germany--History (1)
- Germany--History--Collections (1)
- Germany--Politics and government--1933-1945 (1)
- Germany--Social conditions--Collections (1)
- Middle classes--Germany (1)
- Social conflict (1)
- World War, 1914-1918--Economic aspects--Germany (1)