Columbia subject headings:
Communism--Mexico.
Mexico--Politics and government--1946-1970.
Partido Comunista Mexicano.
Harvard subject headings:
Communism--Mexico
Communism.
Partido Comunista Mexicano.
Working class--Mexico
Princeton subject headings:
Communism--Mexico.
Communism.
Labor movement--Mexico.
Partido Comunista Mexicano.