@book{342,
	author = {Willard, Hobart H.},
	title = {Instrumental methods of analysis /},
	publisher = {Van Nostrand,},
	year = {c1981.},
	address = {New York :},
	edition = {6th ed.},
	note = {Previous ed.: Hobart H. Willard, Lynne L. Merritt, Jr., John A. Dean. 5th ed. 1974.}
}