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How to write arithmetic and algebra by means of the Joint Type Method / by John R. Emblen ; and approved by The College of Teachers for the Blind.
- Emblen, John R.
About this work
London : National Institute for the Blind, [1932?]
17 unnumbered leaves of braille ; 27 cm
Title from cover.
Text is entirely braille.
Catalogue no. 12853.