By Davies, David T.
By T. P. Softley (Lecturer in Physical Chemistry, Lecturer in Physical Chemistry, Oxford University)
By John Daintith
By James, Mary
By Richard S. Westfall (Indiana University)
By School Mathematics Project
By David R. Lide (National Institute of Standards & Technology (Retired), Gaithersburg, Maryland, USA)
By RESNIC
By Brian Martin
By Ronald C. Denney, Roy Sinclair
By Louis A. Bloomfield
By Author M. Unknown
By Robert P. Bauman (University of Alabama, USA)
By Fionn Murtagh, Andre Heck
By Sir James Jeans
By Theo Hahn
By Oxlade, Chris, etc.
By Gethin Morgan Lewis, G.A. Wheatley
By Jim Breithaupt, Ken Dunn
By Anthony V. Nero
By R. Linggard, C. Nightingale, D.J. Myers
By Colin Maunder
By Graham Booth, G.R. McDuell
By Andrew Chandler-Grevatt, Nicky Thomas
By Alan Isaacs
By Tim James
By Patrick Moore
By Katharina Holzinger (Universitat Konstanz, Germany), Christoph Knill (Universitat Konstanz, Bas Arts (Wageningen Universiteit, The Netherlands)
By Chris Sunley, Sue Kearsey, Andrew Briggs