Published by arrangement with the
Institut africain pour le d�veloppement �conomique et social
B.P. 8008, Abidjan, C�te d'Ivoire
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome 1977
FAO Economic and Social/ Development Series No. 3/25
First printing 1977
ISBN 92-5-100156-1
© French edition, Institut africain pour le d�veloppement �conomique et social (INADES) 1969
© English edition, FAO 1977