Columbia subject headings:
Harvard subject headings:
Brazil--Politics and government--1889-1930.
Drought relief--Government policy--Brazil--History--19th century.
Drought relief--Government policy--Brazil--History--20th century.
Droughts--Social aspects--Brazil--History--19th century.
Droughts--Social aspects--Brazil--History--20th century.
Water-supply--Political aspects--Brazil--History--19th century.
Water-supply--Political aspects--Brazil--History--20th century.
Princeton subject headings:
Brazil--Politics and government--1889-1930.
Drought relief--Government policy--Brazil--History--19th century.
Drought relief--Government policy--Brazil--History--20th century.
Droughts--Social aspects--Brazil--History--19th century.
Droughts--Social aspects--Brazil--History--20th century.
Water-supply--Political aspects--Brazil--History--19th century.
Water-supply--Political aspects--Brazil--History--20th century.