Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Brazil, Northeast
Palm oil industry--Brazil, Northeast.
Rural development projects--Brazil, Northeast.
Princeton subject headings:
Babassu--Brazil--Maranhão.
Land tenure--Brazil--Maranhão.
Land use--Brazil--Maranhão.
Maranhão (Brazil)--Economic conditions.
Maranhão (Brazil)--Social conditions.