Columbia subject headings:
Communism--Mexico.
Mexico--Politics and government--1910-1946.
Mexico--Politics and government--1946-1970.
Partido Comunista Mexicano.
Harvard subject headings:
Campa S., Valentín (Campa Salázar), 1904-
Communism--Mexico
Mexico--Politics and government--1910-1946.
Mexico--Politics and government--1946-1970
Partido Comunista Mexicano.
Princeton subject headings:
Communism--Mexico.
Partido Comunista Mexicano.