000 00272nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aPekehs (V)
245 0 _aCybernetic modelay
260 _b"Mir Publishers, Moscor"
260 _c1986
365 _b24
942 _cBK
999 _c215338
_d215338