000			00516nam a2200205Ia 4500
001			CATREF004365
008			110517s9999 xx 000 0 und d
041			_aeng
082			_a513.8
100			_aSommerville, D M Y
245			_aThe elements of non-Euclidean geometry
260			_aNew York _bDover Publications _c1958
300			_axvi, 274 p. _c20 cm.
546			_bRoman
650			_aHyperbolic geometry
650			_aNon-Euclidean geometry
906			_a003482
906			_atext
942			_cBook
999			_c255624 _d255560