Columbia subject headings:
Catholic Church--Mexico--History--20th century.
Conferencia de Organizaciones Nacionales.
Mexico--Church history--20th century.
Secretariado Social Mexicano.
Harvard subject headings:
Catholic Church--Mexico--History--20th century.
Church and state--Mexico--History--20th century
Mexico--Church history--20th century.
Religion and politics--Mexico--History--20th century.
Princeton subject headings: