By The Open University
By L. Susan Stebbing, C. W. K. Mumble
By George B. Thomas, Jr.
By Mary Gibbons Natrella
By School Mathematics Project
By J B Lock
By Chartrand, Gary, Polimeni, Albert D., Zhang, Ping
By Lomax, Richard G, Hahs-Vaughn, Debbie L.
By T D V Swinscow
By Allen G. Debus
By Rotman, Brian
By Wells, David
By Anton, Howard
By Bronson, Richard
By Mills, Gordon
By Spiegel, Murray R.
By Ann Cutler, Rudolph McShane
By Lambourne, Robert, Tinker, Michael
By Salkind, Neil J.
By Welkowitz, Joan, Ewen, Robert B., Cohen, Jacob, Robert B
By Bertrand Russell
By Field, Michael J., Golubitsky, M.
By Dangerfield, Jan, Jewell, Rose, Pope, Sue, Geere, Nick
By Douglas R Hofstadter
By Mankiewicz, Richard
By Unidentified Author
By Marcus Du Sautoy, du Sautoy, Marcus
By Cleaves, H.F.
By Danesi, Marcel