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Title: Audiometer, model 250, by Eckstein Brothers, Los Angeles, US [Go to resource]
Description: Audiometer, model 250, by Eckstein Brothers, Los Angeles, USA. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: audiometers Source: Science Museum Creator: Eckstein Bros. (maker) Identifier: 1991-165/12 Go to resource More Like this...
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