Columbia subject headings:
Gold dredging--Environmental aspects--Amazon River Region.
Gold miners--Amazon River Region.
Gold mines and mining--Brazil.
Gold mines and mining--Economic aspects--Amazon River Region.
Gold mines and mining--Environmental aspects--Amazon River Region.
Gold mines and mining--Social aspects--Amazon River Region.
Harvard subject headings:
Gold dredging--Environmental aspects--Amazon River Region.
Gold miners--Amazon River Region.
Gold mines and mining--Brazil
Gold mines and mining--Economic aspects--Amazon River Region.
Gold mines and mining--Environmental aspects--Amazon River Region.
Gold mines and mining--Social aspects--Amazon River Region.
Princeton subject headings:
Amazon River Region--Economic conditions.
Brazil--Economic conditions--1945-
Gold miners--Amazon River Region--Social conditions.
Gold miners--Brazil--Social conditions.
Gold mines and mining--Amazon River Region.
Gold mines and mining--Brazil.