1. Report on Project no. 26 -- Investigation of ear plugs for protection against gun blast Author(s): Walpole, Robert H., author Publication: Fort Knox, Kentucky : Armored Medical Research Laboratory, 5 August 1944 Subject(s): Ear Protective DevicesBlast Injuries -- prevention & controlEar -- injuriesMilitary PersonnelWorld War IIUnited States
2. Report on project no. 12 -- test of accousti-guard (ear protective device) Author(s): Walpole, Robert H., author Publication: Fort Knox, Kentucky : Armored Medical Research Laboratory, 5 November 1943 Subject(s): Ear Protective DevicesMaterials TestingMilitary PersonnelWorld War IIUnited States
