Columbia subject headings:
Agricultural innovations--Gambia.
Food supply--Gambia.
Income--Gambia.
Irrigation--Economic aspects--Gambia.
Rice trade--Gambia.
Harvard subject headings:
Agricultural innovations--Gambia.
Food supply--Gambia.
Income--Gambia.
Irrigation--Economic aspects--Gambia.
Rice trade--Gambia.
Princeton subject headings:
Agricultural innovations--Gambia.
Food supply--Gambia.
Income--Gambia.
Irrigation--Economic aspects--Gambia.
Rice trade--Gambia.