Não informado. (1949). Geophysical research papers. Air Force Cambridge, Geophysics Research Directorate.
Lua i Stíl Chicago (17ú heag.)Não informado. Geophysical Research Papers. Cambridge, Mass: Air Force Cambridge, Geophysics Research Directorate, 1949.
Lua MLA (8ú heag.)Não informado. Geophysical Research Papers. Air Force Cambridge, Geophysics Research Directorate, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.