Columbia subject headings:
Harvard subject headings:
Haciendas--Mexico--Zacatecas--History.
Mineral industries--Mexico--Zacatecas (State)--History.
Mineral industries--Social aspects--Mexico--Zacatecas (State)
Zacatecas (Mexico : State)--Social conditions.
Princeton subject headings:
Mineral industries--Mexico--Zacatecas (State)--History.
Mines and mineral resources--Mexico--Zacatecas (State).
Zacatecas (Mexico : State)--Economic conditions.
Zacatecas (Mexico : State)--Social conditions.