By Anon
By Schatzinger, Richard, Jordan, John
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 Beaumont, Edward A., Foster, Norman H.
By Ashcroft, WILLIAM
By Bedrikovetsky, P.
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 F W Dunning, Institute of Geological Sciences, Geological Museum
By Tearpock, Daniel J., Bischke, Richard E.
By Kupecz, J.A., etc.
By Davies, R. J., Cartwright, J. A., Stewart, S. A., Lappin, M., Underhill, J. R.
By Chester, Herbert
By Lovell, M.A., etc., Williamson, Gail, Harvey, P.K.
By H. C. "Slip" Slider