000 00253nam a2200109Ia 4500
008 231212s1980 xx 000 0 und d
041 _aeng
082 _a515.4
100 _aFetisov A.I.
245 _aProof in Geometry
260 _aMascow
_bMir Pub
_c1980
999 _c958545
_d958545