Columbia subject headings:
Harvard subject headings:
Indians--Economic conditions--Cross-cultural studies--Congresses.
Indians--History
Latin America--Commerce--History.
Latin America--Economic conditions--Cross-cultural studies--Congresses.
Latin America--Economic conditions.
Mexico--Economic conditions--Cross-cultural studies--Congresses.
Mineral industries--Latin America--History--Cross-cultural studies--Congresses.
Mineral industries--Latin America--History.
Princeton subject headings:
Assadourian, Carlos Sempat.
Indians--Economic conditions.
Mexico--Economic conditions.
Mineral industries--Latin America--History.
Peru--Economic conditions.