Willard, Hobart T. Instrumental methods of analysis / Hobart H. Willard ... [et al.]. - Sixth Edition - New York : Van Nostrand, [1981] - xxiv, 1030 p. : with illustrations 25 cm. Includes bibliographies and index. ISBN: 0442245025 Subjects--Topical Terms: Instrumental analysis.LC Class. No.: QD 79.I5 / .W691 1981