@book{285738,
	author = {Brown, Morton L., and Nelson, Arne B., and National Center for Health Statistics (U.S.),},
	title = {Medical x-ray visits and examinations 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 number of medical x-ray visits and examinations during pregnancy for women having a live birth, by selected demographic characteristics of the women by trimester, previous pregnancy experience and type of examination, and by type of facility. Based on data collected in a survey of physicians and hospitals providing care to a sample of women having a live birth in 1963."},
	url = {https://purl.fdlp.gov/GPO/gpo106560}
}