- 1USA. National Aeronautics and Space Administration
Space science and the physics teacher : presented at the summer meeting of the American Association of Physics Teachers University of Maine, June 28, 1963
Washington, D.C.: National Aeronautics and Space Administration, Office of Educational Programs and Services 1963; V, 65 Seiten; Illustrationen
Weltraumforschung; Physikunterricht - 2USA. National Aeronautics and Space Administration
The search for extraterrestrial life
Washington, D.C.: National Aeronautics and Space Administration, Office of Educational Programs and Services 1963; 20 Seiten; Illustrationen
Astrobiologie; Außerirdisches Leben