000 00249nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aGreg Perry
245 0 _aVisual Basic 6 in 21 Days
250 _a2nd
260 _aN.D.
_bTechmedia
942 _cBK
999 _c13781
_d13781