Columbia subject headings:
Harvard subject headings:
Industrial relations--Brazil--Novo Aripuanã--History.
Rubber industry and trade--Brazil--Novo Aripuanã--History.
Rubber tappers--Brazil--Novo Aripuanã--History.
Rubber tappers--Brazil--Novo Aripuanã--Social conditions.
Princeton subject headings:
Rubber industry and trade--Brazil--Amazonas--History--20th century.
Rubber plantation workers--Brazil--Novo Aripuanã--Economic conditions--20th century.
Rubber plantation workers--Brazil--Novo Aripuanã--Social conditions--20th century.
Rubber plantation workers--Brazil--São Felix--Economic conditions--20th century.
Rubber plantation workers--Brazil--São Felix--Social conditions--20th century.