Helfert, Erich A. Techniques of financial analysis / Erich A. Helfert. - 7th ed. - Homewood, Ill. : Irwin, 1991. - xv, 511 p. ; 23 cm. Includes index. ISBN: 0256079269 (pbk.) Subjects--Topical Terms: Corporations--Finance.Cash flow.Financial statements.Ratio analysis.