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| 100 | _aHIRA D S / GUPTA P K | ||
| 245 | _aOPERATIONS RESEARCH ( HIRA ) | ||
| 250 | _a1 | ||
| 260 | _bS.CHAND & COMPANY LTD. NEW DELHI | ||
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| 520 | _aGeneral | ||
| 650 | _aMathematics & Statistics | ||
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