Columbia subject headings:
Harvard subject headings:
Indians of South America--Peru--Amazonas (Region)--Economic conditions.
Indians of South America--Peru--Amazonas (Region)--Social conditions.
Petroleum industry and trade--Peru--Amazonas (Region)
Princeton subject headings:
Indians of South America--Peru--Amazonas (Region)--Economic conditions.
Indians of South America--Peru--Amazonas (Region)--Social conditions.
Petroleum industry and trade--Peru--Amazonas (Region).