By Fidler, J.C., Wilkinson, B.G., Edney, K.L., Sharples, R.O.
By C. Broertjes, A.M. van Harten
By Robert Geneve (University of Kentucky, USA), John Preece (University of California, Scott Merkle (University of Georgia
By James N. Moore, J. Janick, James M. and Janick Moore
By Fowden G. Maxwell, Peter R. Jennings, FG MAXWELL
By Keith Kirby (Oxford University, UK), Charles Watkins (School of Geography, University of Nottingham
By Bruce Schaffer, Peter C. Andersen
By Robert W. Allard
By J. R. Thomson
By Great Britain: Forestry Commission
By David V. Alford (Ministry of Agriculture, Fisheries & Food, cambridge, England)
By Mark Holderness (CABI Bioscience, Egham, UK), D. McNamara (European and Mediterranean Plant Protection Organization (EPPO)), I. Smith (European and Mediterranean Plant Protection Organization (EPPO)), Peter Scott (CAB INTERNATIONAL)
By Suman Singha (University of Connecticut, Storrs, CT, USA), Tara Baugher
By Marshall E. Mace, etc.
By J. L. Innes, Great Britain: Forestry Commission
By R. J. Garner
By A. J. Grayson (former Director of Research, forestry commission, Great Britain, on behalf of the Scottish Forestry Trust)
By Professor Dr. Y. P. S. Bajaj
By Ian Scoones
By Kerry F. Harris (Texas A&M University, College Station, U.S.A.), Oney P. Smith (Hood College, Frederick, Maryland, James E. Duffus (United States Department of Agriculture, Salinas, California)
By Karl Maramorosch, Kerry F. Harris
By Adel A Kader
By K A Longman, R H F Wilson
By Nuri N. Mohsenin
By Christian Bonte-Friedheim, Kathleen Sheridan, International Service for Agricultural Research (ISNAR)
By Andrew D O'Rourke
By G Roger Fenwick, Ray L Richards, C Hedley, Santosh Khokhar, J Hautvast
By P.M. Harris
By J.M. Thresh