Columbia subject headings:
Agricultural credit--Brazil, Northeast.
Agriculture, Cooperative--Brazil, Northeast.
Regional planning--Brazil, Northeast.
Water resources development--Brazil, Northeast.
Harvard subject headings:
Agricultural credit--Brazil, Northeast.
Agriculture, Cooperative--Brazil, Northeast.
Regional planning--Brazil, Northeast.
Water resources development--Brazil, Northeast
Princeton subject headings:
Agricultural credit--Brazil, Northeast.
Agriculture, Cooperative--Brazil, Northeast.
Regional planning--Brazil, Northeast.
Water resources development--Brazil, Northeast.