By Various
By Vorderman, Carol
By Bright, Michael, Klevansky, Rhonda, Kerrod, Robin, Taylor, Barbara
By Chatterjee, Manini, Manini & Anita Roy.
By Varley, Carol, Miles, Lisa
By Jones, Owen
By Scholastic
By Wessels, Florence
By Guinness World Records
By Hill, David, Cassin, Susan
By Brooks, Felicity
By Bramwell, Martyn
By NO AUTHOR
By Rosen, Michael
By Knapp, Brian
By Pinker, Steven
By Records, Guinness World
By Belinda Gallagher
By Coote, Roger
By John Malam, Steve Parker, Paul Dowswell, Paul Mason
By oxford-university-press, Worrall, Mary, Oxford University Press
By Williams, Brian
By n-a, unkown