000 00227 a2200109 4500
001 12714
090 _c9712
_d9712
100 _aTyagi,C.S.C
245 _aFourth estate
260 _aLONDON
_bGyan Publishing House.
_c2005
300 _a217
942 _aNUST-CAE
999 _c247787
_d247787