 | The mechanism of speech: Lectures delivered before the American Association to Promote the Teaching of Speech to the Deaf, to which is appended: Vowel theories, read before the National Academy of Arts and Sciences, 5th ed. |
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| The mechanism of speech: Lectures delivered before the American Association to Promote the Teaching of Speech to the Deaf, to which is appended: Vowel theories, read before the National Academy of Arts and Sciences, 5th ed. |