An audio-tactile tool for the acquisition, use and management of spatially distributed information by visually impaired people In Proceedings of the Second International Symposium on Maps and Graphics for Visually Impaired People, London, UK, (1988), 24--29

Parkes, D. "Nomad": An audio-tactile tool for the acquisition, use and management of spatially distributed information by visually impaired people In Proceedings of the Second International Symposium on Maps and Graphics for Visually Impaired People, London, UK, (1988), 24--29.]]

1988