1.

図書
図書
1. Speech and hearing
by Harvey Fletcher ; with an introduction by H.D. Arnold
出版情報: New York : Van Nostrand, 1929
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2.

図書
図書
2. Speech and hearing
by Harvey Fletcher ; with an introduction by H.D. Arnold
出版情報: [U.S.] : [Literary Licensing], [2012?], c1929
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