"An analytical study of recent fertility trends in terms of period and cohort measures. Discusses variations in fertility of major population groups by color and place of residence, including Puerto Rico and the Virgin Islands (U.S.). Also discusses characteristics of live births, including sex ratio, month of birth, attendant at birth, birth weight, period of gestation, plurality, and illegitimacy."
"May 1970."
Description based on online resource, PDF version; title from cover (CDC, viewed May 22, 2019).