Columbia subject headings:
Bukharin, Nikolaĭ, 1888-1938.
Communism--Soviet Union--History--20th century.
Soviet Union--Politics and government.
Harvard subject headings:
Bukharin, Nikolaĭ, 1888-1938.
Bukharin, Nikolaĭ, 1888-1938.
Socialism--Soviet Union--20th century.
Socialism--Soviet Union--History--20th century.
Princeton subject headings: