1. Milch, I. C., Rall, D. P., and Tobie, J. E., J. Nat. Cancer Inst., 19, 87 (1957).
2. Milch, I. C., Rall, D. P., and Tobie, J. E., J. Bone and Joint Surg., 40, A, 897 (1958).
3. Regna, P. P., and Solomons, I. A., Ann. N.Y. Acad. Sci., 53, 229 (1950).
4. Sognnaes, R. F., Shaw, J. H., Solomon, A. K., and Harvold, E., Anat. Rec., 104, 319 (1949).
5. Pitzurra, M., Bruni, M., and Muzii, E., Annali d'Igiene Sclavo, 2, 213 (1960).