@book{285730,
	author = {Kovar, Mary Grace, and National Center for Health Statistics (U.S.),},
	title = {Differentials in expectation of additional children among mothers of legitimate live births :},
	publisher = {U.S. Department of Health, Education, and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health Statistics,},
	year = {1972.},
	series = {Vital and health statistics. Series 22, Data from the national vital statistics system ;},
	address = {Rockville, Md. :},
	note = {"Statistics on differentials in the proportion of mothers expecting to have additional children and in the average number of additional children expected, according to selected demographic and socioeconomic characteristics. Based on data collected by a questionnaire mailed to mothers for a sample selected from records of births in 1964, 1965, and 1966 which were filed with the National Center for Health Statistics."},
	url = {https://purl.fdlp.gov/GPO/gpo106529}
}