1. Ervin, D. M., and Young, L. E. (1950). Blood, 5, 61. Jordan. W. S.. Jr., Prouty, R. L., Heinle, R. W., and Dingle, J. H. (1952). Ibid., 7, 387.
2. Young, L. E., Christian, R. M., Ervin, D. M., Swisher, S. N., O'Brien, W. A., Stewart, W. B., and Yuile, C. L. (1951). Proceedings ofthe 3rd International Congress of the International Society of Hematology, Cambridge, Eng., 1950, p. 226. Heinemann, London.
3. Zinkham, W. H., and Diamond, L. K. (1952). Blood, 7, 592.