000 00338nam a2200145Ia 4500
008 220926s9999 xx 000 0 und d
100 _aAshok Kumar Singh
245 0 _aScience & Technology
250 _a3rd Ed
260 _aNew Delhi
260 _bTata McGraw Hill
260 _c2009
650 _aScience & Technology
942 _cBK
999 _c23638
_d23638