1. Anonymous 1966-1964 Vital Statistics of the United States. Vol. 1. Natality, Section 4. U.S. Dept. of Health, Education and Welfare, Washington, D.C., p. 10.
2. 1962 Documenta Geigy Scientific Tables. Ardsley, New York.
3. and 1966 Applied Regression Analysis. Wiley, New York, pp. 77-81.
4. 1970 Down's Syndrome (Mongolism)-A study of 2421 cases born alive to Massachusetts residents 1958-1966, Harvard School of Public Health, Doctoral Thesis.
5. Illegitimacy and Down's Syndrome