1. Price, P. B., Rajan, R. S., and Tamhane, A. S., Astrophys. J., 151, L109 (1968).
2. Lal, D., Rajan, R. S., and Tamhane, A. S., Nature, 221, 33 (1969).
3. Bhandari, N., Bhat, S. G., Lal, D., Rajagopalan, G., Tamhane, A. S., and Venkatavaradan, V. S., Apollo 12 Conf., 3, 1 (Houston, 1971).
4. Fleischer, R. L., Price, P. B., Walker, R. M., and Maurette, M., J. Geophys. Res., 72, 331 (1967).
5. Bhandari, N., Bhat, S. G., Lal, D., Rajagopalan, G., Tamhane, A. S., and Venkatavaradan, V. S., Apollo 12 Conf., 3, III (Houston, 1971).