@book{344,
	author = {Willard, Hobart H.},
	title = {Instrumental methods of analysis /},
	publisher = {D. Van Nostrand Co.,},
	year = {c1981.},
	address = {New York :},
	edition = {6th ed.},
	note = {1st-5th ed. by H. H. Willard, L. L Merritt, and J. A. Dean.}
}