Columbia subject headings:
Harvard subject headings:
Agricultural ecology--Africa--Congresses.
Agriculture and state--Africa--Congresses.
Agriculture--Africa--Congresses
Agriculture--Social aspects--Africa--Congresses.
Princeton subject headings:
Agricultural ecology--Africa--Congresses.
Agriculture--Africa--Technology transfer--Congresses.
Agriculture--Economic aspects--Africa--Congresses.
Agriculture--Social aspects--Africa--Congresses.
Rural development--Africa--Congresses.