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Start Over Subjects Military Personnel ✖Remove constraint Subjects: Military Personnel Subjects United States ✖Remove constraint Subjects: United States Authors Mayo Aero Medical Unit, author. ✖Remove constraint Authors: Mayo Aero Medical Unit, author. Authors Boothby, Walter M., author ✖Remove constraint Authors: Boothby, Walter M., 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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