Columbia subject headings:
Bernstein, Leon, 1877---Library.
Communism--Soviet Union--Bibliography--Catalogs.
Revolutionaries--Soviet Union--Bibliography--Catalogs.
Russia--History--1801-1917--Bibliography--Catalogs.
Socialist parties--Soviet Union--Bibliography--Catalogs.
Soviet Union--History--Bibliography--Catalogs.
Soviet Union--Politics and government--Bibliography--Catalogs.
Harvard subject headings:
Bernstein, Leon B., 1877-1962--Library.
Communism--Soviet Union--Bibliography--Catalogs.
Revolutionaries--Soviet Union--Bibliography--Catalogs.
Russia--History--1801-1917--Bibliography--Catalogs.
Socialist parties--Soviet Union--Bibliography--Catalogs.
Soviet Union--History--Bibliography--Catalogs.
Soviet Union--Politics and government--Bibliography--Catalogs.
Princeton subject headings: