Modern methods of chemical analysis / Robert L. Pecsok ... [et al.]. Pecsok, Robert L. Modern methods of chemical analysis. Chemistry, Analytic. QD75.2 .M65 1976 543 PEM Edition for 1968 by R. L. Pecsok and L. D. Shields. Includes bibliographical references and index. New York : Wiley, c1976. c1976. 1976 Text xviii, 573 p. : eng