Columbia subject headings:
Harvard subject headings:
Agricultural development projects--Developing countries--Cost effectiveness.
Agricultural systems--Economic aspects--Developing countries.
Livestock--Developing countries--Cost effectiveness.
Livestock--Economic aspects--Developing countries.
Princeton subject headings:
Agricultural development projects--Developing countries--Cost effectiveness.
Agricultural systems--Economic aspects--Developing countries.
Livestock--Developing countries--Cost effectiveness.
Livestock--Economic aspects--Developing countries.