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005 20260205102631.0
008 260111s9999||||xx |||||||||||||| ||und||
082 _a510 P414M
100 _aPerelman,Yakov
245 0 _aMathematics can be fun
260 _aMoscow
_bMir
_c1985
300 _a400p.
690 _aMathematics
942 _cBK
999 _c249344
_d249344