1. American Printing House for the Blind (APH), 2016. Annual report 2016: Distribution of eligible students based on the federal quota census of January 3, 2015. Available from: https://www.aph.org/federal-quota/distribution-of-students-2016/.
2. Architectural and Transportation Barriers Compliance Board, 2016. Americans with Disabilities Act (ADA) Accessibility Guidelines for Transportation Vehicles. US Department of Transportation, Washington, DC. Available from: https://www.federalregister.gov/documents/2016/12/14/2016-28867/americans-with-disabilities-act-ada-accessibility-guidelines-for-transportation-vehicles.
3. Teaching travel at complex intersections;Barlow,2010
4. Disability statistics from the American Community Survey (ACS);Erickson,2017
5. Fazzi, D.L., Barlow, J.M., 2017. Orientation and Mobility Techniques: A Guide for the Practitioner, second ed., AFB Press, New York, NY.