Não informado. (1950). Astronautics Information Literature Search. Jet Propulsion Laboratory, California Institute of Technology.
Lua i Stíl Chicago (17ú heag.)Não informado. Astronautics Information Literature Search. Pasadena, Calif: Jet Propulsion Laboratory, California Institute of Technology, 1950.
Lua MLA (8ú heag.)Não informado. Astronautics Information Literature Search. Jet Propulsion Laboratory, California Institute of Technology, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.