HELFERT ERICH A. (1992). TECHNIQUES OF FINANCIAL ANALYSIS. JAICO PUBLISHING HOUSE.
Chicago-čujuhus (17. p.)HELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. MUMAI: JAICO PUBLISHING HOUSE, 1992.
MLA-čujuhus (9. p.)HELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. JAICO PUBLISHING HOUSE, 1992.
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