000 00250nam a2200097Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aBACH (MOURICE J)
245 0 _aDESIGN OF THE UNIX OPERATING SYSTEMS
260 _bPRENTICE HALL DELHI
942 _2ddc
999 _c95214
_d95214