By Ann Montague-Smith
By Sherran, Peter
By Graham Galtrey
By John L Cable
By Pearce, Chris
By Riddington, Mark, Grier, Martin
By Kathryn Scott, Janet Crawshaw, Scott, Kathryn, Crawshaw, Janet
By Morgan, Rowland
By Scottish Primary Mathematics Group
By Hine, Gregory, Reaburn, Robyn, Anderson, Judy, Galligan, Linda, Carmichael, Colin, Cavanagh, Michael, Ngu, Bing, White, Bruce
By Collins GCSE
By Collins KS3
By Johnny Ball, Ball, Johnny
By Mapp, Fiona
By Speed, Brian, Gordon, Keith, Evans, Kevin
By Gordon, Keith, Evans, Kevin, Speed, Brian, Senior, Trevor
By Keith Gordon, Kevin Evans, Brian Speed, Trevor Senior, Gordon, Keith, Evans, Kevin, Speed, Brian, Senior, Trevor
By Rayner, David
By Bond, J. M.
By Oxford Dictionaries
By CGP Books