1. Kahn, D. S., Makhani, J. S., and Skoryna, S. C., Laval Medicale, 34, 169 (1963).
2. Schubert, J., Atompraxis, 4, 393 (1958).
3. Lengemann, F. W., in Transfer of Calcium and Strontium across Biological Membranes, edit. by Wassermann, 85 (New York, Academic Press, 1963).
4. Michon, G., and Guilloux, M. J., Second U.N. Int. Conf. on Peaceful Uses of Atomic Energy, Geneva, 23, 439 (1958).
5. Skoryna, S. C., Paul, T. M., and Waldron-Edward, D., Canad. Med. Assoc. J., 91, 285 (1964).