By Jan Golonka
By David N. Knight
By Roger A. Young
By Selley, Richard C.
By Germaine A. Joplin, John R. Richards, Christine A. Joplin
By Rankilor, P.R.
By Kummel, Bernhard
By James R. Tindall, Roger Thornhill
By Sylvester-Bradley, P. C. and T. D. Ford. (editors).
By Palmer, Robert R.
By D. J. Davies, Fritz Machatschek
By Anderton, R., Bridges, P., Leeder, Mike R., Sellwood, B.W.
By Allen, Philip A., John R.
By Thornbury, William D.
By Blowers, Andrew
By Fox, Vivien, Speake, Janet, Bale, John
By Floyd, Esme
By Morris, Jan, Wakefield, Paul
By Martin, Chris
By Open University
By Dubos, Rene
By Ghillean Prance
By peter-b-sloep-and-andrew-blowers
By Reddish, Alan, Blunden, John
By Sarre, Philip, Blunder, John
By Reddish, Alan, Sarre, Philip
By Blackmore, Roger, Reddish, Alan
By Mark Brandon, Nigel Clark