000 00329nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c350/-
040 _aET
100 _aWALIA EKTA
245 0 _aOPERATING SYSTEM CONCEPTS
260 _bKHANNA BOOK PUBLISHING
_aNEW DELHI
300 _a340
500 _a40621
942 _cBK
999 _c46636
_d46636