By Ziegler, Peter A.
By Welland, Michael
By Baxter, Stephen
By Wegener, Alfred
By Fortey, Dr Richard
By Southwood, Richard
By British Geological Survey
By Lyons, S. Kathleen, Behrensmeyer, Anna K., Wagner, Peter J., Peter
By Hay, William W.
By Rider, M.H.
By Morris, A., Tarling, D. H.
By Boldy, S.A.R.
By Scrutton, R.A., etc., Stoker, M.S., Shimmield, G.B., Tudhope, A.W.
By Lucas, S. G., Cassinis, G., Schneider, J.W.
By Vaughan, A. P. M., Leat, P. T., Pankhurst, R. J.
By Nottvedt, A.
By Shennan, Ian, Andrews, J.
By Andrews, P., Banham, P.