1. Estimated rates of Down syndrome in live births by one year maternal age intervals for mothers aged 20–49 in a New York study: Implications of the “risk” figures for genetic counseling and cost-benefit analysis of prenatal diagnosis programs;Hook,1977
2. Frequency of Down syndrome by single year maternal age interval: Results of a Massachusetts study;Hook;Teratology,1979
3. Down syndrome in live births by single year maternal age interval in a Swedish study: Comparison with results from a New York study;Hook;Am J Hum Genet,1978
4. A simple function for maternal age specific rates of Down syndrome in the 20–49 age interval and its biological implications;Lamson;Am J Hum Genet,1980
5. Lamson SH, Hook EB. Comparison of mathematical models for the maternal age dependence of Down syndrome rates. Hum Genet (in press)