An illustrated Handbook to Radcliffe's Patent Triangle of Number an Apparatus for Demonstrating Principles and Processes of Arithmetic on a new system and other Educational Inventions
Publication date : 1899
Author or editor: Radcliffe, William
Notes: With photograph of William Radcliffe inside rear cover.In Education scrapbook.
Language: English
Physical description: 16 p. : ill.; 22 cm.; pamphlet
Item name: pamphlet
Collection: Library
ID number: M 04494
Classification: D.426/1xf(p.7)