Books by Martha Hron:
Books in the extended shelves:
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Hron, Martha: Improving bus accessibility systems for persons with sensory and cognitive impairments (Federal Transit Administration, Office of Technical Assistance [and Safety] ;, 1993), also by Katharine M. Hunter-Zaworski and United States. Federal Transit Administration. Office of Technical Assistance and Safety (page images at HathiTrust)
Find more by Martha Hron at your library, or elsewhere.