000 00331nam a2200145Ia 4500
008 180710s9999 xx 000 0 und d
020 _a169036
082 _a510
_bDOR
100 _aDOROFEEV, G.
245 _aElementary mathematics
260 _aMoscow
_bMIR pub
_c1980
300 _a488 p.
650 _aMathematics
942 _cS
999 _c62438
_d62438