Yazar
john r witcombe
6 cilt bulundu.
John R. Witcombe, William Erskine · Distributors for the U.S. and Canada, Kluwer Boston
256 sayfa · 1984
Lentils / Legumes / Chickpea / Fava bean / Germplasm resources
John R. Witcombe, John Farrington · Intermediate Technology Publications
284 sayfa · 1998
Development / Seed technology / Seeds / Seed industry and trade / Standards
John R. Witcombe, John Farrington · Oxford & IBH Pub.
271 sayfa · 1998
Seed technology / Agricultural extension work
Robert Tripp, Niels Louwaars, W. Joost van der Burg, Daljit Virk S., John R. Witcombe · Overseas Development Institute
31 sayfa · 1997
Agriculture & Farming / The Environment
John R. Witcombe, Seth R. Beckerman, USAID Title XII Collaborative Research Support Program on Sorghum and Pearl Millet, International Crops Research Institute for the Semi-arid Tropics, International Pearl Millet Workshop (1986 ICRISAT Center) · ICRISAT
354 sayfa · 1987
Pearl millet / Congresses