Helfert, Erich A. Techniques of financial analysis Erich A. Helfert - 5th ed. - Homewood, Ill R.D. Irwin 1982 - x, 304 p. ill. 24 cm. Subjects--Topical Terms: Corporations--FinanceCash flowFinancial statementsRatio analysis Dewey Class. No.: 658.1 / 51