000 00313 a2200133 4500
035 _a
090 _c20990
_d20990
100 _aPerelman, Ya. I
245 _aAlgebra can fun
_cYa. I. Perelman
260 _aMoscow
_bMir
_c1979
300 _a227 p
_c16 cm
500 _aContine bibliografie
942 _aIMAR
_cCART
_sSN
999 _c20717
_d20717