Columbia subject headings:
Harvard subject headings:
Immigrants--United States--Congresses.
Mexicans--United States--Congresses.
Mexico--Emigration and immigration--Congresses.
Mexico--Emigration and immigration.
Michoacán de Ocampo (Mexico)--Emigration and immigration--Congresses.
Michoacán de Ocampo (Mexico)--Emigration and immigration.
Migration, Internal--Mexico--Congresses.
United States--Emigration and immigration--Congresses.
United States--Emigration and immigration.
Princeton subject headings:
Mexico--Emigration and immigration.
Michoacán de Ocampo (Mexico)--Emigration and immigration.
Migration, Internal--Mexico.
United States--Emigration and immigration.