000 00292nam a2200121Ia 4500
100 _aBeck, Leland L
020 _a0-201-10987-5
942 _cBK
245 _aSystem software
260 _aAddison-Wesley publishing company, Massachusetts
_c1985
082 _a001.6425 Bec
300 _axiii,434
999 _c13576
_d13576