Columbia subject headings:
Appropriate technology--Developing countries.
Economic development.
Science--Social aspects--Developing countries.
Technological innovations--Economic aspects--Developing countries.
Harvard subject headings:
Appropriate technology--Developing countries.
Economic development.
Science--Social aspects--Developing countries.
Technological innovations--Economic aspects--Developing countries
Princeton subject headings:
Appropriate technology--Developing countries.
Economic development.
Science--Social aspects--Developing countries.
Technological innovations--Economic aspects--Developing countries.