000 00249nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aYadav, K..K.
245 0 _aComputer Shikshan
260 _aAgra
_bAggarwal
_c2014
300 _a138p.
942 _cBK
999 _c15546
_d15546