194,325 HEUSER ROBERT L. /wstęp/ Fertility tables for birth, cohorts by color:United States,1917-1973. Introd. by Heuser Robert L. Rockville 1976 U.S.Department of Health, Education,and Welfare.Public Health Service 4° s. nlb.2, III, nlb. 1, 459. [The tables contain data for calendar years 1917-73.The data will be updated annually in "Vital Statistics of the U.S". Vol. 1. Natality,beginning with the 1974-data year]