title: FLASHING-BEACON EXPERIMENT FOR MERCURY-ATLAS 9 (MA-9) MISSION.NASA TN D-2377.
mesh_terms: D001203:Ascomycota; D001270:Cervical Atlas; D006801:Humans; D008628:Mercury; D008921:Religious Missions; D013026:Space Flight; D013028:Space Perception; D014481:United States; D018557:United States National Aeronautics and Space Administration; D014796:Visual Perception
chemical_list: D008628:Mercury
keywords: SPACE FLIGHT; SPACE PERCEPTION; VISUAL PERCEPTION