000 00281nam a2200121Ia 4500
041 _aEN
082 _a327
_bORL
100 _aOrlov, B.P .
245 0 _aSiberia:Achievements Problems,Solutions / B.P.Orlov.
260 _bMoscow : Progress ,
_c1977
300 _a189
942 _cBK
999 _c15600
_d15600