@book{41963,
	author = {Sullivan, Lisa M.},
	title = {Essentials of biostatistics /},
	publisher = {Jones and Bartlett Publishers,},
	year = {c2008},
	address = {Sudbury, Mass. :},
	url = {http://www.loc.gov/catdir/toc/ecip0717/2007019656.html}
}