Columbia subject headings:
Brazil, Northeast--Social conditions.
Droughts--Brazil, Northeast.
Famines--Brazil, Northeast.
Food supply--Brazil, Northeast.
Seca.
Harvard subject headings:
Brazil, Northeast--Social conditions.
Droughts--Brazil, Northeast
Famines--Brazil, Northeast.
Food supply--Brazil, Northeast.
Seca.
Princeton subject headings:
Brazil, Northeast--Social conditions.
Droughts--Brazil, Northeast.
Famines--Brazil, Northeast.