By Stanton, Neville A., Salmon, Paul M., Rafferty, Laura A., Walker, Guy H.
By Barton, John, Rogers, Lord Richard
By Bretherick, L., Urben, Peter
By Springer, Richard
By Ramstorp, Matts
By Ridley BSc CEng MIMechE FIOSH DMS, John
By Addley, Ken
By Association for Science Education
By Colin Cummings
By Kenneth Everett, Professor E. W. Jenkins
By Michael Mcgannon
By M. Pendlebury, C. Brace, A. Gibb
By Susan Fink, Christopher Dering
By Andrew Hopkins
By Ian Coombes
By Prometric
By Janet Braune, Malcolm Dewis, etc.
By D H Fremlin (University of Birmingham, UK)