Columbia subject headings:
Industries--Latin America--History.
Migrant labor--Latin America--History.
Migrant labor--Peru--History.
Mineral industries--Peru--History.
Harvard subject headings:
Industrialization--Latin America--History.
Industries--Latin America--History.
Migrant labor--Latin America--History.
Migrant labor--Peru--History.
Mineral industries--Peru--History.
Princeton subject headings:
Industries--Latin America--History.
Migrant labor--Latin America--History.
Migrant labor--Peru--History.
Mineral industries--Peru--History.