000 00280nam a2200121Ia 4500
008 160710s1973 xx 000 0 und d
082 _a510 DOR
100 _aDORAFEEV,G.
245 _aELEMENTARY MATHEMETICS
260 _bMIR PUBLICATION
_c1973
300 _a488
942 _2ddc
_cB
999 _c38353
_d38353