University College of Addis Ababa. Geophysical Observatory & Haile Sellassie I University. Geophysical Observatory. (1959). Bulletin of the Geophysical Observatory. University College Press.
Citación estilo ChicagoUniversity College of Addis Ababa. Geophysical Observatory and Haile Sellassie I University. Geophysical Observatory. Bulletin of the Geophysical Observatory. Addis Ababa: University College Press, 1959.
Cita MLAUniversity College of Addis Ababa. Geophysical Observatory and Haile Sellassie I University. Geophysical Observatory. Bulletin of the Geophysical Observatory. University College Press, 1959.
Warning: These citations may not always be 100% accurate.