VOHRA N D. (1992). QUANTITATIVE TECHNIQUES. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Cita Chicago Style (17a ed.)VOHRA N D. QUANTITATIVE TECHNIQUES. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1992.
Cita MLA (9a ed.)VOHRA N D. QUANTITATIVE TECHNIQUES. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1992.
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