W.G. Spencer, "Inventional geometry; a series of problems, intended to familiarize the pupil with geometrical conceptions"
English | ISBN: 1418178918 | 2005 | 103 pages | Djvu | 0,9 MB
English | ISBN: 1418178918 | 2005 | 103 pages | Djvu | 0,9 MB
Inventional geometry; a series of problems, intended to familiarize the pupil with geometrical conceptions, and to exercise his inventive faculty. With a prefatory note by Herbert Spencer.