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经与
Institut africain pour le d�veloppement �conomique et social
B.P.安排出版。8008, 阿比让, C�te d'Ivoire

联合国粮食和农业组织
1977 年罗马

粮农组织经济和社会/发展丛书第 3/25 号

1977 年首次印刷

国际标准书号 92-5-100156-1

© 法语版,Institut africain pour le d�veloppement �conomique et social (INADES) 1969
© 英文版,FAO 1977

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