By Bruce Bartholomew, Chang Hung Ta
By Roy Alexander (Chester College, UK), Andrew C. Millington (University of Leicester
By Robert W. Allard
By Vernon Ahmadjian, Surindar Paracer, Lynn Margulis
By A.G. Morton
By D. H. Jennings, A. J. Trewavas
By Bruce Schaffer, Peter C. Andersen
By David G. Robinson
By Alastair H. Fitter (University of York, U.K.), Robert K.M. Hay (Scottish Agricultural Science Agency, EDINBURGH, Scotland)
By Royal Botanic Gardens, Kew
By Mabberley, D. J.
By Seidel, Dankwart, McClintock, David, Eisenreich, Wilhelm, Bell, A.
By Pilcher, Helen
By Joy Tivy
By Y.M. Menzies, Maggie Redfern
By James Merryweather, Michael Hill
By N.T. Gill, K.C. Vear
By Graham Russell (University of Edinburgh), Bruce Marshall (Scottish Crop Research Institute, Dundee), Paul G. Jarvis (University of Edinburgh)
By J. G. Hawkes
By J. H. M. Thornley
By Franklin Bretschneider (Utrecht University, utrecht, The Netherlands), Jan R. de Weille (University of Montpellier, Montpellier, France)
By Nadine B Carozzi
By A.D. Imms, O.W. Richards, R.G. Davies
By Ray Desmond
By Andrew Sclater
By Edward Hyams
By John Brownlie, Forrester Sue
By Malcolm B. Wilkins
By David Middleton
By Chidumayo, Emmanuel