By Pocock, J. G. A.
By Rubin, Miri
By Brown, Richard, Ruttle, Kate
By Swanson
By Rogers, L. C. G.
By Hayes, Thomas C., Horowitz, Paul
By Linse, Caroline, Schottman, Elly
By Esol, cambridge
By Williams, Peter John
By Beeston, A. F. L., Johnstone, T. M., Serjeant, R. B., Smith, G. R.
By Sage, Lorna
By Swan, Michael, Walter, Catherine
By Hashemi, Louise, Murphy, Raymond
By Mascull, Bill
By Remacha Esteras, Santiago
By School Mathematics Project
By Ledoux Joseph E & Hirst William
By Duncan, Graeme
By Wilson, Keith, Goulding, Kenneth H.
By Tirion
By Smith, Wake
By Gray, Julia
By Kampourakis, Kostas
By Lagnado, David A.
By Saravanan, R.
By Krimsky, Sheldon
By Hunnes, Dana Ellis