Não informado. (1959). Geoscience abstracts. American Geological Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Geoscience Abstracts. Washington: American Geological Institute, 1959.
Lua MLA (8ú heag.)Não informado. Geoscience Abstracts. American Geological Institute, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.