4 treff

Strengthening national agricultural research systems : policy issues and good practice
Derek Byerlee, Gary E. Alex
Bok Engelsk 1998
Africa's emerging maize rvolution
edited by Derek Byerlee and Carl K. Eiche...
Bok Engelsk 1997
Impacts of international wheat breeding research in the developing world, 1966-1990
Derek Byerlee and Piedad Moya
Bok Engelsk 1993
Crop management research and extension : the products and their impact on productivity
Greg Traxler and Derek Byerlee
Bok Engelsk 1992