Ethiopia. YaʼAwrā gwadānā bālaśelṭān.

• Ethiopia, progress in highway transport
• Proceedings of the fourth annual I.H.A. conference for the district engineers & superintendents, April 5-7-8-9-10, 1971, Addis Ababa
• The development of highways in Ethiopia
• The development of international routes in Ethiopia and their place in the eastern African and trans-African highway systems