By Anon
By Beaumont, Edward A., Foster, Norman H.
By Sanderson, Henry
By Jahn, Cook, Graham
By Telford, W
By Owen, David
By Gallun, Rebecca A., Wright, Charlotte J., Nichols, Linda M., Stevenson, John W.
By Wilson, P. D.
By Gabolde, Gilles, Nguyen, Jean-Paul
By Theys, Philippe
By Consentino, Luca
By Satinder Chopra (author) &, Kurt J. Marfurt (author)
By Bourdarot, Gilles, Balvet, Barbara Brown
By Sheriff, R
By Cannon, S. J. C., Ellis, D.
By Hyne, Norman
By H. C. "Slip" Slider
By Mastalerz, M., Glikson, M. V., Golding, Suzanne D.
By Brady, Barry H.G., Brown, E. T.
By Coleman, J.M.
By Dranfield, Kevin
By Fritz, R.D., etc.
By Ashcroft, WILLIAM
By Davies, R. J., Cartwright, J. A., Stewart, S. A., Lappin, M., Underhill, J. R.
By Schatzinger, Richard, Jordan, John
By Tearpock, Daniel J., Bischke, Richard E.
By Kupecz, J.A., etc.
By J Evan-Hart and D Stuckey, Greg Payne, Julian Evan-Hart
By F W Dunning, Institute of Geological Sciences, Geological Museum
By Lovell, M.A., etc., Williamson, Gail, Harvey, P.K.