American Printing House for the Blind
Books
Nolan, Carson Y., Morris, June E. (1971). Improvement of tactual symbols for blind children: 1 June 1964--28 February 1969 : final report, American Printing House for the Blind,
Nolan, Carson Y., Morris, June E. (1971). Improvement of tactual symbols for blind children: 1 June 1964--28 February 1969 : final report, American Printing House for the Blind,