@book{218513,
	author = {National Center for Health Statistics U.S.},
	title = {National Hospital Ambulatory Medical Care Survey},
	publisher = {U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Center for Health Statistics},
	address = {Hyattsville, Md.},
	note = {Description based on :1992, published 1994; title from caption (viewed Mar. 11, 2009)},
	url = {http://purl.access.gpo.gov/GPO/LPS2704}
}