Proceedings of the fourth annual I.H.A. conference for the district engineers & superintendents, April 5-7-8-9-10, 1971, Addis Ababa
By: conducted by the Operations Division, the Imperial Highway Authority.
Contributors: YaʼAwrā gwadānā bālaśelṭān. Operations Division.
Publisher: Imperial Highway Authority
Published: 1971
Place of publication: [Addis Ababa]
Language: eng
Number of pages: 62
Subjects: Highway engineering -- Ethiopia -- Management -- Congresses.