Columbia subject headings:
Hoover Institution Archives--Catalogs.
Nicolaevsky, Boris I., 1887-1966--Archives--Catalogs.
Socialism--Soviet Union--History--Sources--Bibliography--Catalogs.
Soviet Union--Politics and government--Bibliography--Catalogs.
Harvard subject headings:
Hoover Institution Archives--Catalogs.
Nicolaevsky, Boris I., 1887-1966--Archives--Catalogs.
Socialism--Soviet Union--History--Sources--Bibliography--Catalogs.
Socialism--Soviet Union--Sources--Bibliography--Catalogs.
Soviet Union--Politics and government--Bibliography--Catalogs.
Princeton subject headings:
Hoover Institution on War, Revolution, and Peace--Archives--Catalogs.
Nicolaevsky, Boris I., 1887-1966--Archives--Catalogs.
Socialism--Soviet Union--History--Sources--Bibliography--Catalogs.
Soviet Union--Politics and government--Bibliography--Catalogs.