Columbia subject headings:
Mina San Martín (Mexico)
Miners' Strike, Sombrerete, Zacatecas, Mexico, 2007.
Strikes and lockouts--Miners--Mexico--Sombrerete (Zacatecas)--History.
Harvard subject headings:
Mina San Martín (Mexico)
Miners' Strike, Sombrerete, Zacatecas, Mexico, 2007.
Strikes and lockouts--Mexico--Sombrerete (Zacatecas)--Mining--History.
Princeton subject headings:
Mina San Martín (Mexico)
Miners' Strike, Sombrerete, Zacatecas, Mexico, 2007.
Strikes and lockouts--Mexico--Sombrerete (Zacatecas)--Mining--History.