000 00255nam a2200109Ia 4500
008 230416s9999||||xx |||||||||||||| ||und||
020 _a862770548
050 _aHG8075 .C582 1981
245 0 _aSystems and data processing
260 _c1981
942 _2lcc
_cBK
999 _c1949
_d1949