Columbia subject headings:
Agriculture--Economic aspects--Brazil, Northeast--Maps.
Agriculture--Economic aspects--Brazil, Northeast.
Brazil, Northeast--Population--Maps.
Brazil, Northeast--Population.
Cities and towns--Brazil, Northeast.
Maps.
Natural resources--Brazil, Northeast.
Harvard subject headings:
Princeton subject headings:
Agriculture--Economic aspects--Brazil, Northeast--Maps.
Agriculture--Economic aspects--Brazil, Northeast.
Brazil, Northeast--Population--Maps.
Brazil, Northeast--Population.
Cities and towns--Brazil, Northeast.
Natural resources--Brazil, Northeast.