Helfert, Erich A Techniques of financial analysis by Erich A. Helfert - 3rd ed. - Homewood, Ill R. D. Irwin 1972 - viii, 270 pages : illustration, ; 23 cm. ISBN: 9710800221 Hadiah Subjects--Topical Terms: Corporations--FinanceCash flowFinancial statementsRatio analysis