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Start Over You searched for: Formats Text ✖Remove constraint Formats: Text Collections World War 2, 1939-1949 ✖Remove constraint Collections: World War 2, 1939-1949 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 Boothby, Walter M., author ✖Remove constraint Authors: Boothby, Walter M., author Languages English ✖Remove constraint Languages: English Copyright Public domain ✖Remove constraint Copyright: Public domain