Article Title,Year,Volume,Issue,Page Range,Author Entrance to and exit from air evacuation aircraft for ambulatory patients,1948,60,,37,Kreiser Study of regular Army pilots for years 1920-1941,1948,60,,32,Cutler Personnel selection and classification procedures; psychomotor tests,1948,60,,17,Payne A study on the visibility of aircraft insignia,1948,60,,11,Haber To investigate the problems of visual perception and recognition of aircraft traveling at trans and supersonic speeds,1948,60,,10,Jennings