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Start Over Formats Text ✖Remove constraint Formats: Text Collections World War 2, 1939-1949 ✖Remove constraint Collections: World War 2, 1939-1949 Subjects Military Personnel ✖Remove constraint Subjects: Military Personnel Subjects United States ✖Remove constraint Subjects: United States Subjects Military Medicine ✖Remove constraint Subjects: Military Medicine Authors Code, Charles F. (Charles Frederick), 1910-1997, author ✖Remove constraint Authors: Code, Charles F. (Charles Frederick), 1910-1997, author Authors Mayo Aero Medical Unit, author. ✖Remove constraint Authors: Mayo Aero Medical Unit, author. Titles Studies in aviation medicine ✖Remove constraint Titles: Studies in aviation medicine Copyright Public domain ✖Remove constraint Copyright: Public domain

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