George Washington University. Post Graduate Courses on Aviation Ophthalmology and Aviation Medicine: Washington, D.C. (February 3-7, 1941). "Fatigue in Aviation", February 3-7, 1941

George Washington University. Post Graduate Courses on Aviation Ophthalmology and Aviation Medicine: Washington, D.C. (February 3-7, 1941). "Fatigue in Aviation", February 3-7, 1941, Box: 155, Folder: 12. Ross A. McFarland Papers, FSC-1. Special Collections. https://wright.libraryhost.com/repositories/2/archival_objects/53550 Accessed November 23, 2024.