Henderson, David W. Experiencing geometry : euclidean and non-euclidean with history / by David W. Henderson and Daina Taimina. - 3rd ed. - Upper Saddle River, New Jersey : Pearson Education, 2005. - xxx, 392 pages : illustrations ; 28 cm. ISBN: 0131437488 Subjects--Topical Terms: Geometry LC Class. No.: QA453 / H38 2005