1. E. H. Stonehill and A. Bendich, Nature (London), 228, 370 (1970).
2. N. G. Anderson, and J. H. Coggin, in Embryonic and Fetal Antigens in Cancer, Vol. 1, p. 7 (Oak Ridge Natl. Lab.; USAEC Report, 1971).
3. N. G. Anderson and J. H. Coggin, in Embryonic and Fetal Antigens in Cancer, Vol. 2, p. 361 (Oak Ridge Natl. Lab.; USAEC Report, 1972).
4. G. I. Abelev, Cancer Res., 28, 1344 (1968).
5. D. J. R. Laurence and A. M. Neville, Brit. J. Cancer, 26, 335 (1972).