000 00289nam a2200109Ia 4500
008 171211s9999 xx 000 0 und d
245 _aGeometry and Billiards
245 _cSerge Tabachnikov
260 _c2005
650 _xGAMES
856 _uhttp://down.ebook777.com/056/9780821839195.pdf
999 _c348906
_d348906