Published by arrangement with the
Institut africain pour la
dveloppement conomique et social
B.P. 8008, Abidjan, Cte d'Ivoire
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome
1977
FAO Economic and Social Development Series No. 3/21
First published 1970
Reprinted 1972, 1977, 1984
P-69
ISBN 92-5-100622-9
© French edition, Institut africain pour le dveloppement
conomique et social (INADES) 1967
© English edition, FAO
1970