000 00306nam a22001337a 4500
003 OSt
008 240207b |||||||| |||| 00| 0 eng d
082 _a510
_bD61E
100 _aDorofeev ,G.
245 _aElementry mathematics
260 _aMascow Mir publication
_c1973
300 _a488
942 _2ddc
_cBK
999 _c36850
_d36850