00524nam a2200181Ia 4500082002200000100001500022245003900037260002700076300001400103490006500117500000500182690000600187700000500193952010300198964001700301921000900318999001500327  a658.4034bG427.EO  aGhosal, A.  aElements of operational researchb  aDelhibHindustanc1969  axi, 207p.  aInternational monographs on Advanced Mathematics and Physics  a  a   a  00104070aISIbISId1998-09-09l0o658.4034 G427.EOpDP3500r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a9706  c9706d9706