@book{4472,
	author = {Gillun, Brenda. and National Center for Health Statistics U.S.},
	title = {Trends in hospital utilization},
	publisher = {U.S. Dept. of Health and Human Services, Public Health Service, Center for Disease Control, National Center for Health Statistics},
	year = {1996.},
	series = {Vital and health statistics.},
	address = {Hyattsville, Md.}
}