By Stanley Chernicoff, Ramesh Venkatakrishnan
By Brian J. Skinner, Stephen C. Porter
By Dorothy Merritts, etc., Andrew deWet (Franklin Marshall College, USA), Kirsten Menking (Vassar College
By Harvey Blatt, Ernest G. Ehlers, Robert Tracy, Robert Tracy (Virginia Polytechnic Institute, USA)
By A. J. Parsons, P.G. Knight
By Michael Stone, Zenobia Barlow
By Hettie Judah
By Matthew Hedman
By D. Flinn, British Geological Survey
By James G. Carrier
By Stott, Tim, etc.
By Maria Harding
By DK
By Michael G. Smith
By E. Fejer, S. Frampton, Cecilia Fitzsimons
By Tamara Driessen
By Jeff Goodell
By Matthieu Auzanneau, Richard Heinberg
By Anna Claybourne, Geoff Ward
By Bob Symes, Christopher Stanley, Richard Herrington
By Jennings, Terry
By Horden, Bob
By Carol Baldwin
By Knapp, Brian
By Charles C. Plummer, David McGeary (both of California State University at Sacremento, USA)
By Michael J. Hambrey, Jurg Alean
By E. M. Bridges
By Hoare, Philip
By V. Briginshaw