By Jennings, Terry
By Sinclair MacLeod, Martin Skelton, John Stringer, Macleod, Sinclair, Skelton, Martin, Stringer, John
By Claybourne, Anna
By Gallagher, Rosemarie, Parish, Richard
By Kevin Evans
By GINN SCIENCE
By Morton, Ron, Lloyd, John
By McCaughrean, Geraldine
By George Philip & Son
By Holderness
By Vickers, K. M., etc., K. M. Vickers
By Vic Parker
By Robert Kirkwood
By Bayliss, Tim
By Dove, Jane
By McIlveen, Dr Rob, Russell, Julia, CLAMP, Alan, Coolican, Hugh, Gross, Richard
By Cardwell, Mike, Clark, Liz, Meldrum, Claire
By Davenport, G.C.
By Raban, Bridie
By Hilary Ansell
By Cash, T.
By Williams, Pat, Jinks, David
By O'Reilly, Susie
By Scoffham, Stephen, etc.
By Roy Richards, Doug Kincaid
By Jennings, Sue
By Unidentified Author, School Mathematics Project
By School Mathematics Project