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The report entitled "Western Electric Hearing Aids, Models 65 and 66, Acceptable" appeared in the June 5 issue of The Journal (137:534). Inadvertently the thickness of Model 66 was recorded as 3.8 cm. (1 1/2 inches), whereas it should have been 2.8 cm. (1 3/32 inches).
Western Electric Hearing Aids. JAMA. 1948;138(2):142. doi:10.1001/jama.1948.02900020038017
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