By Mills, Steve, Koll, Hilary
By McArdle, Sean, Wren, Wendy
By Igloo Books Ltd
By Letts KS2
By White, Michael
By Hartley, WILLIAM
By Unknown
By Letts
By Clemson, David, Bond 11+
By Beverley, Paula
By Kirsteen Rogers, Karen Tomlins
By Unnamed
By Broadbent, Paul
By Peter Clarke, Clarke, Peter
By Vorderman, Carol
By Mooney, Claire, Briggs, Mary, Fletcher, Mike, Hansen, Alice, McCullouch, Judith
By Headington, Rita
By Holt, P.J.
By Kaner, Peter, etc.
By Fannon, Paul, Kadelburg, Vesna, Woolley, Ben, Ward, Stephen
By Mathematics in Action Group
By Primrose, Alison, Bond 11+
By S. D. Bell
By Schofield & Sims, Andrew Parker, Jane Stamford