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Development Of An Extra Small And Extra Large Size For The V-51 R Earplug
Author(s): Blackstock, D. T., Von Gierke, H. E.
Corporate Author(s): Aero Medical Laboratory
Laboratory: Aero Medical Laboratory
Date of Publication: 1956-04
Report number: WADC TR 56-142
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Factors Influencing The Evaluation Of Ear Protective Devices
Author(s): Hansen, R. G., Blackstock, D. T.
Corporate Author(s): Aero Medical Laboratory
Date of Publication: 1958-05
Report number: WADC TR 57-772

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