@book{285733,
	author = {Kovar, Mary Grace, and United States.},
	title = {Employment during pregnancy :},
	publisher = {U.S. Department of Health, Education, and Welfare, Public Health Service,},
	year = {1968.},
	series = {Vital and health statistics. Series 22, Data from the national vital statistics system ;},
	address = {Washington, D.C. :},
	note = {"Statistics on the prevalence of employment during pregnancy and the trimester of pregnancy during which the woman was last emplcyed, according to selected socioeconomic characteristics of the mother. Based on data collected by a questionnaire mailed to a sample of mothers selected from the certificates of legitimate live births in 1963 filed with the National Center for Health Statistics."},
	url = {https://purl.fdlp.gov/GPO/gpo106556}
}