By Anon
By Fritz, R.D., etc.
By Various Authors, Various
By Nally, Marcel (Marc), Marc
By Henriquez Jose
By Joan Allen, P H Newby
By Hyne, Norman
By Beaumont, Edward A., Foster, Norman H.
By Schatzinger, Richard, Jordan, John
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 F W Dunning, Institute of Geological Sciences, Geological Museum
By Lovell, M.A., etc., Williamson, Gail, Harvey, P.K.
By H. C. "Slip" Slider
By Ashcroft, WILLIAM
By Cannon, S. J. C., Ellis, D.
By Dranfield, Kevin
By Coleman, J.M.
By Brady, Barry H.G., Brown, E. T.
By Mastalerz, M., Glikson, M. V., Golding, Suzanne D.
By Bedrikovetsky, P.
By Severin, Kenneth P.
By Zimmerle, H.
By Matheron, G., Armstrong, M.
By Sengbush, Ray L.
By Parasnis, D.S.
By Svoboda, Jan
By Annels, A.E.