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1by Hamma, H., Comite Permanent Inter-Etats de Lutte contre la Secheresse dans le Sahel, Ouagadougou (Burkina Faso) fre, International Seminar on Integrated Pest Management of Food Crops in the Sahel eng 6-13 Dec 1984 Niamey (Niger), Laycock, D., Maiga, S.D., Abdel Malak, N.N.
Published 1986Texto bibliotecaFAO IT