The lightspot operated typewriter: a communication aid for severely bodily handicapped patients.
D003143:Communication Devices for People with Disabilities / Q000600:supply & distribution; D006257:Head / Q000503:physiopathology; D006801:Humans; D008027:Light; D008297:Male; D009068:Movement; D012046:Rehabilitation; D012656:Self-Help Devices / Q000600:supply & distribution