[1] Amer Fdn Blind, Arlington, VA 22202 USA
[2] Univ South Carolina Upstate, Sch Educ, Spartanburg, SC USA
[3] New Mexico State Univ, Alamogordo, NM USA
[4] Western Michigan Univ, Kalamazoo, MI 49008 USA
[5] Univ Massachusetts, Boston, MA 02125 USA
[6] New Mexico Sch Blind & Visually Impaired, Albuquerque, NM USA
[7] Univ Kentucky, Lexington, KY USA
[8] New Mexico Sch Blind & Visually Impaired, Alamogordo, NM USA