Não informado. (2003). Earth Sciences History. History of the Earth Sciences Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Earth Sciences History. Troy, NY: History of the Earth Sciences Society, 2003.
Lua MLA (8ú heag.)Não informado. Earth Sciences History. History of the Earth Sciences Society, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.