Não informado. (1966). Abstracts of North American geology. U.S. Geological Survey.
Lua i Stíl Chicago (17ú heag.)Não informado. Abstracts of North American Geology. Washington: U.S. Geological Survey, 1966.
Lua MLA (8ú heag.)Não informado. Abstracts of North American Geology. U.S. Geological Survey, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.