Columbia subject headings:
Communism--Bolivia--History.
Communists--Bolivia--History.
Partido Obrero Revolucionario (Bolivia)--History.
Harvard subject headings:
Communism--Bolivia--History.
Communists--Bolivia--History.
Partido Obrero Revolucionario (Bolivia)--History.
Princeton subject headings:
Communism--Bolivia--History.
Communists--Bolivia--History.
Partido Obrero Revolucionario (Bolivia)--History.