By McDougal Littel
By Stow, Marion, Foxman, Derek
By Danny Kodicek
By Spiegel
By Ronald Harry Atkin
By Doug Cooper, Michael Clancy
By Wren, Kevin
By Davis, Philip J., Hersh, Reuben, Davis; Hersh
By Theoni Pappas
By Theakstone, Wilfred, Harrison, Colin
By Dudzic, Stella
By Karl Soreskos
By Norris, Jill
By J.L. Smyrl
By Beare
By Learning by Questions Team
By Spode Group
By Abram, John, Lewis, David, Swords-Shannon, Oliver, Tyler, Ken
By Sue Graves
By Richard Guy Meadows
By David Blackie
By Mills, Steve, Koll, Hilary
By J. A. L. Matheson, N. W. Murray, R. K. Livesley
By Norman Dyson
By William G. Dauben
By David C Peaslee
By Arthur Griffith
By Goldacre, Ben
By Bostock, L, Chandler, F S, L Bostock, F S Chandler
By George S. Tselikis (4Plus company, Athens, Greece), Nikolaos D. Tselikas (University of Peloonnese, Tripolis