Não informado. (1959). Bulletin of the Geophysical Observatory. Haile Selassie i University.
Chicago Style (17th ed.) CitationNão informado. Bulletin of the Geophysical Observatory. Addis Ababa: Haile Selassie i University, 1959.
MLA (8th ed.) CitationNão informado. Bulletin of the Geophysical Observatory. Haile Selassie i University, 1959.
Warning: These citations may not always be 100% accurate.