"RAVINDRAN P. &. S., . (2001). OPERATIONS RESEARCH: Principles & Practice. : JOHN WILEY AND SONS.
"RAVINDRAN PHILIPS & SOLBERG", . 2001. OPERATIONS RESEARCH: Principles & Practice. : JOHN WILEY AND SONS.
"RAVINDRAN PHILIPS & SOLBERG", . OPERATIONS RESEARCH: Principles & Practice. : JOHN WILEY AND SONS. 2001.