000 00323nam a2200133Ia 4500
008 190711s9999 xx 000 0 und d
020 _a19
082 _a621.381951 H249
100 _aHANSEN,P.B
245 0 _aOPERATING SYSTEM PRINCIPLES
260 _aNEW DELHI
_bPrentice Hall
_c1986
300 _a24X18
942 _cBK
_2DDC
999 _c20770
_d20770