1. Farber, S. (1941). Amer. J. Path., 17, 625.
2. Golden, G. N., and Richards, H. G. H. (1953). J. Bone Jt Surg., 35B, 275.
3. Green, W. T., and Farber, S. (1942). Ibid., 24, 499.
4. Tumors and Tumorous Conditions of the Bones and;Jaffe, H.L.,1958
5. Joints. Kimpton, London. and Lichtenstein, L. (1944). Arch. Path., 37, 99.