By The Open University
By Titchmarsh, E. C.
By Bowman, A.W, Robinson, D.R
By Sondheimer, Ernst, Rogerson, Alan
By Paul R Halmos
By A. Walker, J. Millar
By Serge Lang
By Coulson, C.A.
By Martin M Lipschutz
By Murray R Spiegel
By Clarke, L.Harwood
By Eric T. Bell
By W.W Sawyer
By Graham, Lynne
By The Mathematical Association
By Celia, C. W., Nice, A. T. F., Elliott, K. F.
By L.H.CLARKE, F.G.J.NORTON
By Unidentified Author
By Barnard, Tony, Neill, Hugh
By Jordan, David
By Burden, Richard, Faires, J.