1. Randall, J. T., and Wilkins, M. H. F., Proc. Roy. Soc. Lond., A, 184, 366 (1945).
2. Durrani, S. A., Prachyabrued, W., Christodoulides, C., Fremlin, J. H., Edgington, J. A., Chen, R., and Blair, I. M., Proc. Third Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 3, 3, 56 (MIT Press, 1972).
3. Durrani, S. A., Prachyabrued, W., Edgington, J. A., and Blair, I. M., in The Apollo 15 Lunar Samples (edit. by Chamberlain, J. W., and Watkins, C.) (Lunar Science Institute, in the press).
4. Durrani, S. A., Mod. Geol., 2, 247 (1971).
5. Durrani, S. A., and Christodoulides, C., Nature, 223, 1219 (1969).