DescriptionComparative Lettering Hauy-Barbier-Braille.tif English: A comparison of three methods of printing for the blind in the nineteenth century. "A"...
DescriptionComparative Lettering Hauy-Barbier-Braille.jpg Español: Comparative_Lettering_Hauy-Barbier-Braille.tif.jpg Date 29 December 2015 Source Own...