00388nam a2200157Ia 4500 230118s9999||||xx |||||||||||||| ||und|| 81-219-0968-6 658.4034 GUP/P PREM KUMAR GUPTA DR.D.SHIRA PROBLEMS IN OPERATIONAL RESERCH RAM NAGAR ,NEW DELHI S.CHAND &COMPANY LTD 1991 2333 2333 0 0 0 0 CPL CPL 2023-02-07 0 658.4034 12402 2023-02-07 00:00:00 2023-02-07 BK