Não informado. (1957). Egyptian journal of geology. Geological Society of Egypt.
Lua i Stíl Chicago (17ú heag.)Não informado. Egyptian Journal of Geology. Cairo: Geological Society of Egypt, 1957.
Lua MLA (8ú heag.)Não informado. Egyptian Journal of Geology. Geological Society of Egypt, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.