000 00274nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aSergew (N) & Vashkevrich
245 0 _aIntrod to computers
260 _bMir publish
260 _c1981
365 _b12
942 _cBK
999 _c209176
_d209176