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Tiwari N., Shandilya S. K., . (2006). OPERATIONS RESEARCH. NEW DELHI: PRENTICE -HALL OF INDIA.
Tiwari N.K, Shandilya Shishir K, . 2006. OPERATIONS RESEARCH. NEW DELHI: PRENTICE -HALL OF INDIA.
Tiwari N.K, Shandilya Shishir K, . OPERATIONS RESEARCH. NEW DELHI: PRENTICE -HALL OF INDIA. 2006.