Columbia subject headings:
Cerro de Pasco (Peru)--Commerce--History.
Silver mines and mining--Peru--Cerro de Pasco Region--History.
Harvard subject headings:
Cerro de Pasco (Peru)--Commerce--History.
Silver mines and mining--Peru--Cerro de Pasco Region--History.
Princeton subject headings:
Cerro de Pasco (Peru)--Commerce--History.
Silver mines and mining--Peru--Cerro de Pasco Region--History.