1. Hidden harmonies : the lives and times of the Pythagorean theorem /: the lives and times of the Pythagorean theorem. (2011) Other Names: Kaplan, Robert, 1933-; Kaplan, Ellen, 1936- Record Type: Book Extent: 1 online resource (188 pages), illustrations View Content: Available online (eLD content is only available in our Reading Rooms) ↗