00321nam a2200121Ia 4500082001900000100004200019245004200061250000900103260002600112300002200138500000500160700003400165  a510.9bR863.MR  aRouse Ball, W. W. & Coxeter, H. S. M.  aMathematical recreations and essaysb  a13th  aNew YorkbDoverc1987  axvii, 428p. Index  a  aCoxeter, H. S. M. ; jt. auth.