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Start Over You searched for: Subjects United States ✖Remove constraint Subjects: United States Subjects Physiology ✖Remove constraint Subjects: Physiology Subjects Aerospace Medicine ✖Remove constraint Subjects: Aerospace Medicine Authors Code, Charles F. (Charles Frederick), 1910-1997, author ✖Remove constraint Authors: Code, Charles F. (Charles Frederick), 1910-1997, author Authors Baldes, E. J. (Edward James), 1898- author ✖Remove constraint Authors: Baldes, E. J. (Edward James), 1898- author Authors Mayo Aero Medical Unit, author. ✖Remove constraint Authors: Mayo Aero Medical Unit, author. Copyright Public domain ✖Remove constraint Copyright: Public domain