FraserC. F.“Commercial Training of the Blind.”Report of the Second Triennial International Conference on the Blind and Exhibition. Manchester: 1908.
2.
KappelJ. E.Basic Business Concepts for the Braille Student.Philadelphia: Overbrook School for the Blind, 1961.
3.
LongS. V.“Commercial Training for the Blind at Overbrook,”Gregg Writer31 (1929): 205–7.
4.
LongS. V.“Experiments in Commercial Education at Overbrook,”Teachers Forum3 (1930): 6–9.
5.
LongS. V.“Commercial Education for the Blind,”Teachers Forum11 (1938): 17–19.
6.
PaulmierF. F.“Special Problems in Commercial Teaching of Blind.”Proceedings of the 40th Stated Meeting of the American Association of Instructors of the Blind.Philadelphia: American Association of Instructors of the Blind, 1950.
