By Blinko, Janine, Graham, Noel, Janine Blinko, Noel Graham
By Harris, Mary, Hoyles, Celia
By School Mathematics Project
By Alan Brighouse, D. Godber, Peter Patilla, Brighouse, Alan, Godber, D., Patilla, Peter
By diana-boynova, Berry, Catherine, Goldie, Sophie, Stripp, Charlie, Boynova, Diana, Lissaman, Richard
By Willis, Sue
By Bill Domoney, Paul Harrison, Liz Ransford, Christine Symonds, Domoney, Bill, Harrison, Paul, Ransford, Liz, Symonds, Christine
By K.A. Hesse, Hesse, K.A.
By Dean, Peter G.
By Keith Pledger
By Vorderman, Carol
By K. M. Vickers, M. J. Tipler, Henriette Geldof
By Garry Wiseman, Jeff Searle
By David Rayner, Paul Williams
By Richard Parsons
By K. M. Vickers, etc., M. J. Tipler
By CGP Books
By Lesley Higgin
By Steve Mills, Hilary Koll
By Cherri Moseley, Janet Rees