000 00265nam a2200097Ia 4500
008 190719s9999 xx 000 0 und d
100 _aD P Nagpal
245 0 _aQuestions & answers in computer science 'O' level
260 _aNew Delhi
_bWheeler Pub
_c1999
942 _cBK
999 _c10540
_d10540