1. Milch, R. A., Rall, D. P., and Tobie, J. E., J. Nat. Cancer Inst., 19, 87 (1957); J. Bone Joint Surg., 40, A, 897 (1958). Rall, D. P., Loo, T. L., Lane, M., and Kelly, M. G., J. Nat. Cancer Inst., 19, 79 (1957).
2. Branceni, D., and Levy, J., C.R. Soc. Biol., 155, 1469 (1961).
3. Harris, W. H., Jackson, R. H., and Jowsey, J., J. Bone Joint Surg., 44, A, 1308 (1962).
4. Deleu, J., and Bohr, H., Nature, 204, 1103 (1964).
5. De Jong, W. F., Rec. Trav. Chim., 45, 445 (1926).