Columbia subject headings:
Agriculture--Economic aspects--India--Karnataka.
Agriculture--Economic aspects--Nigeria, Northern.
Karnataka (India)--Rural conditions.
Nigeria, Northern--Rural conditions.
Harvard subject headings:
Agriculture--Economic aspects--India--Karnataka.
Agriculture--Economic aspects--Nigeria, Northern.
Carnatic (India)--Rural conditions.
Nigeria, Northern--Rural conditions.
Princeton subject headings:
Agriculture--Economic aspects--India--Karnataka.
Agriculture--Economic aspects--Nigeria, Northern.
Karnataka (India)--Rural conditions.
Nigeria, Northern--Rural conditions.