1. 1
   A dynamic simulation model for growth of the African catfish Clarias gariepinus (Burchell 1822)

   由 Machiels, M. A. M. (Marcel A. M.), 1953-
   出版 1987

   1987.

   110 p. : ill. ; 24 cm.

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2. 2
   Cassava in shifting cultivation : a systems approach to agricultural technology development in Africa

   由 Fresco, Louise
   出版 1986

   Amsterdam : Dordrecht, Netherlands : Royal Tropical Institute-the Netherlands ; Distributed outside the Netherlands by Floris Publications, c1986.

   240 p. : ill., maps ; 22 cm.

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