000 00276nam a2200121 4500
008 160616s 000 0
245 _aGeometries and groups
100 _aNikulin, V.V
100 _aShafarevich, I.R
500 _aB6 M73
942 _cBK
_2BK2736
080 _a514 NIK
999 _c2736
_d2736