Columbia subject headings:
Barbados--Economic conditions.
Barbados--Social conditions.
Foreign workers, Barbadian--Panama--Panama Canal--History--20th century.
Harvard subject headings:
Barbados--Economic conditions.
Barbados--Social conditions.
Foreign workers, Barbadian--Panama--Panama Canal--History--20th century.
Princeton subject headings:
Barbados--Economic conditions.
Barbados--Social conditions.
Foreign workers, Barbadian--Panama--Panama Canal--History--20th century.