By Friese, Kai
By Jan Weggelaer, Louis Joos
By Cyriel Verleyen
By G W Davidson, M A Seaton
By Pearson, Eileen
By N/A
By Davidson, George W., etc.
By Bollinghaus, Elaine, Watson, Ann
By Gibbs, Michael
By Lexus
By Crofton, Ian
By Arnold, Peter
By (Ed.), Chambers
By Harrap
By Manser, Martin H.
By Schlesinger, Arthur M.
By Pollard, Sidney
By Clark, John O. E.
By Schwarz, Catherine
By Horn, Pierre L.
By Montgomerie, Norah, WILLIAM
By Robinson, Mairi
By David Edmonds
By Scottish Mathematics Group