000 00422 a2200169 4500
020 _a8123908423
082 _a510
_bDOR
090 _c6358
_d8716
100 _aDorofeev, G.
245 _aElementary mathematics
_bselected topics and problem solving
260 _aNew Delhi
_bCBS publishers
_c1973
_g2000
300 _a488p.
_c23cm.
650 _aMathematics
700 _aRozov, N.
700 _aPotapov, M.
942 _cL
999 _c35129
_d35129