00492nam a2200193Ia 4500 OSt 20230327113807.0 210423s1979 xx 000 0 und d AL eng 658.4034 23 GUPP GUPTA (Prem Kumar) ; HIRA (D S). 77807 Operations research. New Delhi S Chand & Company Ltd 1979 xvi,1055. 175 INR Operations ; research. ddc BK 155075 155075 0 0 0 0 PGDBM SACPG SACPG 2009-11-03 175.00 1 658.4034 GUPP PG001547 2022-04-25 00:00:00 2022-04-23 2021-04-26 BK