000			00351nam a2200109Ia 4500
008			160531s9999 xx 000 0 und d
100			_aKragh, Helge.
245			_aGeometry and Astronomy: Pre-Einstein Speculations of Non-Euclidean Space
245			_cby Helge Kragh
260			_c2012
856			_uhttps://arxiv.org/ftp/arxiv/papers/1205/1205.4909.pdf
999			_c295215 _d295215