Columbia subject headings:
Harvard subject headings:
Oral histories
Rubber industry workers--Brazil--History--20th century.
Rubber plantation workers--Brazil--History--20th century.
Rubber tappers--Economic conditions.
Rubber tappers--Social conditions.
Princeton subject headings:
Oral histories.
Rubber industry workers--Brazil--History--20th century.
Rubber plantation workers--Brazil--History--20th century.
Rubber tappers--Economic conditions.
Rubber tappers--Social conditions.