000 00259nam a2200097Ic 4500
008 240520s9999 xx 000 0 und d
100 1 _aHansen, Per Binch
245 1 0 _aOperating system riciples /
_cPer Binch Hansen
264 1 _bPrentice Hall
_c1973
942 _cBK
999 _c18942
_d18942