By Parker, Steve
By Morgan, Sally, Morgan, Adrian
By Ian Mercer, G. Cressey (Researcher in Mineral Sciences, The Natural History Museum, London)
By Jack Challoner
By Anna Claybourne
By Chris Oxlade, Tony Wilson
By Chris Oxlade
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 Graham, Peacock
By CGP Books
By Brian Knapp
By Oxlade, Chris
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 Claybourne, Anna
By Richard Hammond
By Donald C. O'Shea, W. Russell Callen, William T. Rhodes
By Reginald William Blake Pearse, Alfred Gordon Gaydon
By K. P. Huber, Gerhard Herzberg
By J. Michael Hollas (University of Reading, UK)