By Great Britain: Agricultural, Development and Advisory Service, Great Britain: Ministry of Agriculture, Fisheries and Food
By IAEA
By Norman Hudson
By C.R.W. Spedding, E.C. Diekmahns, Edward Charles Diekmahns, E.C. Dikmahns
By Raymond A. T. George
By S.C. Pearce
By S. J. Kays
By James L. Brewster (Horticulture Research International, Wellesbourne, UK)
By L. R. Humphreys
By Williams, Colin Norman, etc., Uzo, J. O, Peregrine, W.T.H.
By R.W. Widdowson (Bourne, Lincolnshire, UK)
By Richard J. Chancellor
By F. Baker, P. Terry
By Food and Agriculture Organization of the United Nations
By Hill, Dennis S., Waller, J. M.
By Geoff Godden
By Denis J Murphy (, Head of Biotechnology Unit, Division of Biological Sciences, University of Glamorgan, UK)
By National Research Council, Policy and Global Affairs, Board on Science and Technology for International Development, Panel on Vetiver
By James N. Moore, J. Janick, James M. and Janick Moore
By Bruce Schaffer, Peter C. Andersen
By Suman Singha (University of Connecticut, Storrs, CT, USA), Tara Baugher
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 Batey, Tom
By Baker, Harry
By W. Holmes