@book{35087,
	author = {Greenberg, Raymond S.},
	title = {Medical epidemiology /},
	publisher = {Lange Medical Books/McGraw-Hill,},
	year = {c2005.},
	address = {New York :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0627/2005299440-b.html}
}