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Medicine in the Americas, 1610-1920
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Deafness -- therapy
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The otophone: its history, with a description of its various forms, its use by the deaf, its value as an aid to restoration of hearing, and in the instruction and development of hearing and articulation in the deaf-dumb
✖Remove constraint Titles: The otophone: its history, with a description of its various forms, its use by the deaf, its value as an aid to restoration of hearing, and in the instruction and development of hearing and articulation in the deaf-dumb