1. Catsch, A., and Melchinger, H., Strahlentherapie, 108, 63 (1959).
2. Copp, D. H., and Greenberg, D. M., MDDC, 1001, 11 (1947).
3. Ito, Y., Tsurufui, S., Sikita, M., and Matsushima, Y., Yakugaku Zasshi, 78, 76 (1958).
4. Ray, D. R., Stedman, D. E., and Wolff, N. K., J. Bone Joint Surg., 38-A 637 (1956).
5. Schmid, A., Arch. Exp. Path. Pharm., 240, 30 (1960).