@book{4859,
	author = {Ansel, Howard C.,},
	title = {Pharmaceutical calculations /},
	publisher = {Wolters Kluwer Health/Lippincott Williams & Wilkins,},
	year = {c2010.},
	address = {Philadelphia :},
	edition = {13th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0913/2008045672-d.html}
}