Não informado. (1982). Geophysics: The leading edge of exploration. Society of Exploration Geophysicists.
Lua i Stíl Chicago (17ú heag.)Não informado. Geophysics: The Leading Edge of Exploration. Tulsa, Okla: Society of Exploration Geophysicists, 1982.
Lua MLA (8ú heag.)Não informado. Geophysics: The Leading Edge of Exploration. Society of Exploration Geophysicists, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.