By Humphrey, Douglas, Topping, James
By Peter R. Cox
By Daniel Smith, Smith, Daniel
By Seiter
By Prof. Peter Sprent
By Open University Course Team
By Dalbarade, Jean-Marcel
By Poncet, Patrice, Portait, Roland, Hayat, Serge
By Perkins, Martin, Perkins, Patricia
By Erwin L. Levine, Elmer E. Cornwell
By Sarah Gibson
By David A. Adler, Edward Miller
By Mills, Steve, Koll, Hilary
By Mills, Steve, Hilary Koll
By E.K.Victor Pearce
By E. T. Bell, Underwood Dudley
By White, Michael, Rayner, David
By Heinz-Otto Peitgen, etc., H. Jurgens, D. Saupe (all of the University of Bremen, Germany)
By Richard Gillings
By School Mathematics Project
By Smith, P.
By E. Graham
By Houghton, John
By Connor, John, Soper, Pat
By H. Nicholson, et al
By CGP Books