Design guidelines to make crossing structures accessible to the physically handicapped
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Issued as Progress reports no. [1-18], Technical report, Draft final report, and Final reports no. [1-2], Project no. D-48-647
[1] Edward Steinfeld,et al. ACCESSIBLE BUILDINGS FOR PEOPLE WITH SEVERE VISUAL IMPAIRMENTS , 1979 .
[2] American Foundation for the Blind, Inc , 1921 .
[3] Steven M. Casey,et al. Cognitive Mapping by the Blind , 1978 .