Columbia subject headings:
Harvard subject headings:
Emigrant remittances--Mexico--Zacatecas (State)--Congresses.
Foreign workers, Mexican--United States--Congresses.
Zacatecas (Mexico : State)--Economic conditions--Congresses.
Zacatecas (Mexico : State)--Emigration and immigration--Congresses.
Princeton subject headings:
Emigrant remittances--Mexico--Zacatecas (State)--Congresses.
Foreign workers, Mexican--United States--Congresses.
Zacatecas (Mexico : State)--Economic conditions--Congresses.
Zacatecas (Mexico : State)--Emigration and immigration--Congresses.