Não informado. (1953). Geological abstracts. American Geological Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Geological Abstracts. New York: American Geological Institute, 1953.
Lua MLA (8ú heag.)Não informado. Geological Abstracts. American Geological Institute, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.