By J. Janick
By Robert N. Trigiano, Dennis J. Gray (University of Florida, Apopka, USA)
By James W. Hanover, Daniel E. Keathley
By Jules Janick (Purdue University)
By Lyndsey A. Withers, P.G. Alderson
By M.N. Christiansen, Charles F. Lewis
By Paul A. Hedin, Julius J. Menn, Robert M. Hollingworth
By W. Gottschalk, H.P. Muller
By J. E. Vanderplank (Plant Protection Research Institute, Pretoria, South Africa)
By Evans, L. T.
By David W. James, R. J. Hanks, J. J. Jurinak
By Mahendra Shah, Maurice Strong, World Bank
By Jules Pretty OBE
By Y. P. S. Bajaj
By J.M. Bonga, D.J. Durzan
By Ken Simpson
By National Research Council, Policy and Global Affairs, Policy Division, Board on Sustainable Development
By Francis Blake
By Clifford A. Adams
By Tudge, Colin Tudge
By Ya'acov Lesham, etc.
By J. M. Whipps, R. D. Lumsden
By P.S. Carlson