By Bird, John O., May, A. J. C.
By Bretherick, L., Urben, Peter
By Bradley, Walter G., etc.
By Morgan, Neil
By Wills, Eric D., Thomas, J.Hywel, Gilham, Brian
By Anand, D.K.
By Lester, Albert, Trimble, Geoffrey
By J S Anderson
By Will Kimber
By R.E. Vears
By John C. Morris
By Michael H. Tooley
By Keith Brindley
By W A Kimber
By Christopher M. Norris
By D. W. Tyler
By Nigel Palastanga, Roger W. Soames, Derek Field
By S.A. Knight
By Richard Monk
By Morris A. Colwell
By Robert Philip Beales
By William Bolton (Formerly Lecturer, Buckingham Chilterns University College, High Wycombe, UK)
By Waterworth, G., Robertson, Christopher R.