000 00289nam a2200109Ia 4500
008 230719s9999||||xx |||||||||||||| ||und||
082 _a005.12
100 _aBECK LELAND L
245 0 _aSYSTEM SOFTWARE : AN INTRODUCTION TO SYSTEMS
_bPROGRAMMING
260 _bP E A
_c2004
_aDELHI
300 _a519
999 _c159
_d159