1. Turner, F. J., and Weiss, L. E., Structural Analysis of Metamorphic Tectonites (McGraw Hill, 1963).
2. Sorby, H. C., Edin. New Phil. J., 10, 137 (1853).
3. Roy, R., and Osborn, E. F., Amer. Min., 39, 853 (1954). Winkler, H. G. F., Geochim. et Cosmochim. Acta, 13, 66 (1957). Carr, R. M., and Fyfe, W. S., Geochim. et Cosmochim. Acta., 21, 103 (1960).
4. Rooksby, H. P., X-ray Identification and Crystal Structures of Clay Minerals, 368 (Mineralogical Society, London, 1961).