By Sikdar, Pradip K.
By Trabant, P.K.
By Van Driessche, Alexander E.S., Kellermeier, Matthias, Benning, Liane G., Gebauer, Denis
By Garg, Vikas, Singh, Vijay P., Raj, Vijay
By Ringrose, Philip, Bentley, Mark
By Edward S. Dana
By A. R. Ubbelohde
By Ailsa Allaby, Michael Allaby
By Walter Schumann
By Ronald Bonewitz
By Andrew Ross
By Natural History Museum
By Ian Mercer, G. Cressey (Researcher in Mineral Sciences, The Natural History Museum, London)
By Peters, K. E.
By Adams, A.E., Mackenzie, W.S., Guilford, C.
By Hambrey, Michael
By Woodcock, Nigel
By Battey, M.H.
By Nriagu, Jerome O., Nieboer, Evert
By Brian Simpson
By Johannesson, Karen H.
By Marumo, F.
By MacDougall, J. D.
By van den Haute, P., De Corte, Frans
By Varentsov, I.M.
By Severin, Kenneth P.
By Wagner, Gunther A., Haute, Peter van den, van den Haute, Peter
By Mastalerz, M., Glikson, M. V., Golding, Suzanne D.
By Alloway, Brian J.
By Barceló, Damià, Petrovic, Mira