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Start Over Subjects Ear Protective Devices ✖Remove constraint Subjects: Ear Protective Devices Subjects World War II ✖Remove constraint Subjects: World War II Titles Report on Project no. 26 -- Investigation of ear plugs for protection against gun blast ✖Remove constraint Titles: Report on Project no. 26 -- Investigation of ear plugs for protection against gun blast Copyright Public domain ✖Remove constraint Copyright: Public domain

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  • Report on Project no. 26 -- Investigation of ear plugs for protection against gun blast1