00339nam a2200133Ia 4500020001800000082001700018100002600035245006900061250000800130260003400138300002300172500000500195700000500200  a9780716799481  a516bG798.EN  aGreenberg, Marvin Jay  aEuclidean and non-euclidean geometries bdevelopment and history  a4th  aNew YorkbW. H. Freemanc2008  axxix, 637p. Index.  a  a