By Watson
By Butterworth, John
By Fletcher, Lesley, Graham
By Wren, Wendy
By Stevens, Christopher
By Nixon, James
By Gogerly, Liz, Gordon, Mike
By SPMG, Scottish Primary Maths Group
By IMPACT Project Uni Of N.London
By Perrett, Bryan
By Leonard, M.G., M.G. Leonard
By Books, Webber, Activity Books, Animal
By Liberts, Jennifer, Jackson, Mike
By Gifford, Clive
By Arlon, Penny
By Thomson, Ruth
By DK:
By Anon, Ladybird
By Chrisp, Peter
By Funfax
By Kumon
By Mayhew, James
By Jacqueline Wilson, Nick Sharratt, Wilson, Jacqueline, Sharratt, Nick
By Bentley, Diana