By School Mathematics Project
By Open University Course Team
By Huggins-Cooper, Lynn, Broadbent, Paul, Head, Alison
By Collins Easy Learning
By Colin Beveridge
By June Haighton, Anne Haworth, Steve Lomax, Andrew Manning, Kathryn Scott
By Sue Chandler, Linda Bostock, Ewart Smith, Audrey Shepherd, Ian Bettison
By Sue Chandler, Linda Bostock, Ewart Smith, Ian Bettison
By Walker, Peter M.B.
By Ian McDonagh, G. Waterworth
By Bostock, L, Chandler, F S, L Bostock, F S Chandler
By Jan Dangerfield, Rose Jewell, Sue Pope, Nick Geere
By John D. Collins, etc.
By Collins GCSE
By Author Team, Combined
By J.E. Szymanski
By Bird, John O., May, A. J. C.
By Ali Almossawi
By Gessen, Masha
By Sherwood, M, Sutton, C ed. by, Martin, Christine
By Povey, Thomas
By David Hillard
By Eason, G., Coles, C.W., Gettinby
By Silver, Edward A.
By Broy, M., Schmidt, Gunther
By Pearce, Stephen