By van Veldhuizen, Laurens, Waters-Bayer, Anne, de Zeeuw, Henk
By Wilkinson, J.M., Stark, B.A.
By Schjonning, Per, Christensen, Bent, Elmholt, Susanne
By IAEA
By Great Britain: Agricultural, Development and Advisory Service, Great Britain: Ministry of Agriculture, Fisheries and Food
By D.A. Cooke, R.K. Scott
By G. W. Cooke
By John R. Archer
By G. Pilkington, S. Kendall
By G.V. Dyke
By J. G. Hawkes
By C.F.H. Bishop, W. Maunder
By G. J. Jellis, D. E. Richardson
By Nigel Boatman
By Lockhart, J. A. R., Wiseman, A. J. L.
By Technical Centre for Agriculture
By Barth, Susanne, Milbourne, Dan
By Purseglove, J. W., Green, C. L., Brown, E. G., Robbins, S. R. J.
By Nicky Scott, Roy Chadwick
By Jain, Shri Mohan, Al-Khayri, Jameel M., Johnson, Dennis V.
By Kihara, Job, Fatondji, Dougbedji, Jones, James W, Hoogenboom, Gerrit, Tabo, Ramadjita, Bationo, Andre
By Bationo, Andre, Waswa, Boaz, Okeyo, Jeremiah M., Maina, Fredah, Kihara, Job, Mokwunye, Uzo
By Bationo, Andre, Waswa, Boaz, Kihara, Job, Adolwa, Ivan, Vanlauwe, Bernard, Saidou, Koala
By Lugtenberg, Ben
By Davis, D. Layten, Nielsen, Mark T.
By Acquaah, George
By Richards, Alison, Morgan, Joan, Dowle, Elizabeth
By Bajaj, Y. P. S.
By Ashraf, Muhammad, Öztürk, Munir, Ahmad, Muhammad Sajid Aqeel, Aksoy, Ahmet
By Wakil, Waqas, Romeno Faleiro, Jose, Miller, Thomas A.