Columbia subject headings:
Bauer, Otto, 1881-1938.
Communism.
Gramsci, Antonio, 1891-1937.
Socialism.
Harvard subject headings:
Bauer, Otto, 1881-1938.
Communism.
Gramsci, Antonio, 1891-1937
Socialism.
Princeton subject headings:
Bauer, Otto, 1881-1938.
Communism.
Gramsci, Antonio, 1891-1937.
Socialism.