WILDBERGER, N.J. Divine proportions: rational trigonometry to universal geometry / [by] N.J.Wildberger - Sydney Wild Egg 2005 - xx, 300 p. Includes appendixes, bibliography and index. ISBN: 097574920X Subjects--Topical Terms: TrigonometryAbstract descriptive geometry Dewey Class. No.: 516.2 / WIL