West African agriculture, by F. R. Irvine. 3rd ed., by Peter M. Ahn and F. R. Irvine
Irvine, Frederick Robert.
Ahn, Peter Martin.
London Oxford U.P,
1970
Previous ed. published in 1 vol. as 'A textbook of West African agriculture' (B53-5321) 1953
bibl p255
Agriculture