Columbia subject headings:
Earth sciences--Research--Developing countries.
Land use--Developing countries--Planning.
Harvard subject headings:
Developing countries--Economic policy.
Earth sciences--Developing countries--Research--Developing countries.
Earth sciences--Research--Developing countries--Developing countries.
Land use--Developing countries--Planning.
Princeton subject headings:
Earth sciences--Developing countries--Research--Developing countries.
Land use--Developing countries--Planning.