By Stella Dudzic, Rose Jewell
By Anne Haworth, Paul Winters, H. Prior, S. Burns, Margaret Thornton
By Christopher J. Cox, D. Bell
By Isaacs, Alan, Chapman, D., Uvarov, E., D. R. Chapman, Alan Isaacs, E. B. Uvarov
By John A. Ball
By Clarke, Peter
By MST207 Course Team
By SSMG
By SPMG, Scottish Primary Maths Group, Scottish Primary Maths Group SPMG
By Polya, George
By Bollobás, Béla
By Scottish Primary Maths Group
By Mullan, Edward C. K.
By Johnston, Ian
By Elliott Mendelson
By Underwood Dudley, G. Menzel
By Dewdney, A. K.
By Sybil P Parker, McGraw-Hill
By GCHQ
By Carl B. Boyer (Brooklyn College), Uta C. Merzbach
By Kit Yates
By Collins KS1, Hall, Tom
By Mary Baratta-Lorton
By Liebeck, Pamela
By Tear, Carol
By Hugh Neill, Douglas Quadling, Julian Gilbey
By Open University Course Team
By Henry Sinclair Hall; Samuel Ratcliff Knight
By Audrey Simpson
By Roger Hufford