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Encyclopaedia of seed production of world crops
edited by A. Fenwick Kelly and Raymond A....
Bok Engelsk 1998
Seed planning and policy for agricultural production : the roles of government and private enterprise in supply and distribution
A. Fenwick Kelly
Bok Engelsk 1989
Seed production of agricultural crops
A. Fenwick Kelly
Bok Engelsk 1988
Improved seed production : a manual on the formulation, implementation and evaluation of seed programmes and projects
edited by Walther P. Feistritzer and A. F...
Bok Engelsk 1978