1. Johns, W.D., Grim, A.E., and Bradley, W. Jr. Journal of Sedimentary Petrology
24, 242 (1954)
2. Norrish, K., and Taylor, R.M., Clay Minerals Bull. 5, 98 (1962)
3. Babitsyn, B.K., and Ushatinskii, I.N. Chemical Abstracts, 78 168 (1973)
4. Nicolas, J., Dorrillet, B., and Quintin, M., Chemical Abstracts
69, 766 (1968)
5. Bentelspacher, Hans, and Rietz, Egbert, Chemical Abstracts
71, (1969)