Hearing aids / by Edith L. R. Corliss.
|Main Author:||Corliss, Edith L. R.|
[Washington, D.C.] U. S. Dept. of Commerce, National Bureau of Standards, 1953.
"Issued March 2, 1953."
Issued as revision of the Bureau's Circular 516 with title: Selection of hearing aids.
ii, 18 p. :
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