By Harrison, Paul, Montague-Smith, Ann, Paul Harrison, Ann Montague-Smith
By Montague-Smith, Ann, Harrison, Paul
By Harrison, Paul, Montague-Smith, Ann
By School Mathematics Project
By Crowden, Jane, Cowling, Sandy, King, Andrew, Mumford, Jeanette
By Cowling, Sandy, Crowden, Jane, King, Andrew, Mumford, Jeanette
By BBC
By Hony, B.V., Ledsham, A.
By Turner, D. A., etc., Hony, B.V., Ledsham, A., Oakley, K.D., Potts, I.A., Lane, P.S.
By Hony, Viv, Turner, David, Oakley, K, Lane, P
By Shuard, H
By Eric A. Albany
By NCCT
By Paul Latham, Percy Truelove
By Fleet, Tony
By Speed, Brian
By Shell Centre Joint Matriculation Board of Mathematics