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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 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

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