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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 WHITED NATIONS
Rome
1976
FAO Economic and Social Development Series No. 3/2
First published 1970
Reprinted 1972
Second edition
1976
Reprinted 1983
P-69
ISBN 92-5-100141-3
© French �dition, Institut africain pour le d�veloppement
�conomique et social (INADES) 1970
© English edition, FAO
1976