By Foulsham Books
By Gardner, Jack
By Yates, Annette
By Geddes, Sheila
By Simon Veness
By Carolyn Humphries
By Priory Publications, Woods, John
By The Scottish Mathematical Panel
By Ken Russell, Philip J. Carter
By Ann Roth
By Ned Halley
By Veena Chopra
By C.J. Harrison
By Amanda Statham
By Molly Perham
By David Orange
By Julian Worthington
By John King
By Susan Crook
By Sarah Sanderson
By Maggie Black
By Stuart Miller
By Debbie Brixey
By Sonia Allison
By Das Gupta, etc.