Singels, Abraham; Annandale, John George; De Jager, J.M.; Schulze, R.E. (Roland Edgar); Inman-Bamber, N.G.; Durand, W.; Van Rensburg, L.D.; Van Heerden, Pieter Schalk; Crosby, Charles Tobias; Green, George Clifford; Steyn, Joachim Marthinus
(South African Society of Crop Production/ Soil Science Society of South Africa/ Southern African Weed Science Society/ Southern African Society for Horticultural Sciences, 2010)