By Graham C. Hill
By James, Mary
By Hewitt, Sally
By Sally Hewitt
By Jo Chambers
By School Mathematics Project
By Gill Matthews, Belinda Worsley
By Symmons, Dave
By Carpenter, Humphrey, Keene, Paul, Wood, Christine
By Sang, David, Ryan, Lawrie, Taylor, Jane, Petheram, Louise, McMonagle, Derek, Ellis, Peter, Godding, Phil
By David Sang, Lawrie Ryan, Jane Taylor, Louise Petheram, Derek McMonagle
By Ina Taylor
By Taylor, Ina
By Penney, Sue, Sue Penney
By Aylett, John
By Ramsden, Eileen
By Margaret K. Sands
By McDuell, G.R.
By Stone, Barry, etc.
By Wootten, Pat
By Mark Ellse
By Monger, Grace, etc.
By Louise Petheram, Petheram, Louise
By Wright, Chris
By Hill, Graham C.
By Baines, John