000 00278nam a2200121Ia 4500
100 _aMitra, C & Others
942 _cBK
245 _aChallenge and response
260 _aNew Delhi
_bWiley eastern
_c1986
082 _a370.954
_bB.I.T.S.
300 _axiv,252
546 _aEnglish
999 _c331281
_d331281
041 _aeng