00527nam a22001817a 4500 20250207140243.0 250207b |||||||| |||| 00| 0 eng d 9788121909686 eng Gupta, Prem Kumar and Hira, D. S. 3797 Problems in Operation Research: Principles and Solutions Prem Kumar Gupta and D. S. Hira 1st New Delhi : Sultan Chand, 2013 Mathematics MATH 475 Operation research BK 16030 16030