title: [Heliotrop - the concept and application of the photoelectric aid for the blind (author's transl)].
mesh_terms: D001766:Blindness / Q000534:rehabilitation; D004582:Electronics, Medical / Q000295:instrumentation; D006801:Humans; D011044:Poland; D012682:Sensory Aids / Q000295:instrumentation*
vernacular_title: Koncepcja i przewidywanie zastosowania heliotropu. Przyrzad dla niewidomych.