Não informado. (1959). Bulletin of the Geophysical Observatory. Haile Selassie i University.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of the Geophysical Observatory. Addis Ababa: Haile Selassie i University, 1959.
Lua MLA (8ú heag.)Não informado. Bulletin of the Geophysical Observatory. Haile Selassie i University, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.