Columbia subject headings:
Mexico--Politics and government.
Harvard subject headings:
Princeton subject headings:
Mexico--Politics and government--1910-1946--Databases.
Mexico--Politics and government--1946-1970--Databases.
Mexico--Politics and government--1970-1988--Databases.
Mexico--Politics and government--1988-2000--Databases.
Mexico. Congreso. Cámara de Diputados--Databases.