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The Emergence of a Global Agricultural Research System: The Role of the Agricultural Research and Extension Group (Esdar) (Environmentally Sustainable ... Research and Extension Group Report, No 1)by: Michel Petit, Gary E. Alex, Wanda Collins, John J. Doyle, Russell D. Freed, Franz Heidhues, Uma J. Lele, G. J. Persley, Henri A. Rouille D'Orfeuil, Harvey Blackburn1996-10
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by: Arthur Conan. Introduction by Gary K. Wolfe. Illustrated by Harry Robins. DOYLE
1989