title: An obstacle detecting device for the blind.
authors.forename: V
authors.initials: V
authors.lastname: TWERSKY
mesh_terms: D001766:Blindness; D006801:Humans; D010268:Parapsychology; D011825:Radar; D019987:Persons with Visual Disabilities
keywords: BLINDNESS/obstacle detection; PERCEPTION/extrasensory; RADAR/for blind