Columbia subject headings:
Miners--Peru--Cerro de Pasco--History--19th century.
Quality of work life--Peru--Cerro de Pasco--History--19th century.
Harvard subject headings:
Cerro de Pasco (Peru)--History.
Copper miners--Peru--Cerro de Pasco--History.
Copper mines and mining--Peru--Cerro de Pasco--History.
Princeton subject headings: