GUPTA PREM KUMAR. (2003). OPERATIONS RESEARCH. S.CHAND & COMPANY LTD.
Chicago-čujuhus (17. p.)GUPTA PREM KUMAR. OPERATIONS RESEARCH. NEW DELHI: S.CHAND & COMPANY LTD, 2003.
MLA-čujuhus (9. p.)GUPTA PREM KUMAR. OPERATIONS RESEARCH. S.CHAND & COMPANY LTD, 2003.
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