000 00287nam a2200109Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aBECK (LELAND L)
245 0 _aSYSTEM SOFTWARE : AN INTRODUCTION TO SYSTEM PROGRAMMING
250 _a13TH
260 _bPEARSON EDUCATION
942 _2ddc
999 _c98938
_d98938