1. BOYD W. C. Science. In press.
2. LAHOVARY , N. Science , 117 , 259 ( 1953 ).
3. MOURANT A. E. Science. In press.
4. . The Distribution of the Human Blood Group 8. Oxford: Blackwell. In press.
5. MATHER K. The Mea 8urement of Linkage in Heredity. New York: Wiley 1951.