By Peter Ladefoged
By Ian Mercer, G. Cressey (Researcher in Mineral Sciences, The Natural History Museum, London)
By Anna Claybourne
By B. Greene
By Rachel Lynette, Oxford Designers and Illustrators
By Chris Oxlade, Tony Wilson
By J Breithaupt
By Robert Resnick, David Halliday, Kenneth S. Krane, K. Krane (Oregon State University, USA)
By Sue Humphries, Susan Rowe, Carol Holliday
By Gordon, Maria, Gordon, Mike
By Oxlade, Chris
By Graham, Peacock
By CGP Books
By University of Cambridge Local Examinations Syndicate
By Brian Knapp
By Brian Williams, David Antram, Karen Barker Smith
By Davies, Kay
By S Aston
By Clare Oliver
By Karen Bryant-Mole
By Llewellyn, Claire
By Nicola Baxter
By Michael White, Bill Bryson
By Albert Einstein, Alan Lightman
By David Brodie, Graham Booth