APA
Welde-Markos W., . (1976). Terrain evaluation for highway engineering land system mapping of the Lake Abaya area. Addis Abeba: Ethiopian Road Authority; Transport and Road Research Laboratory. Joint Road Research Project.JRRP report 6.
Chicago
Welde-Markos W, . 1976. Terrain evaluation for highway engineering land system mapping of the Lake Abaya area. Addis Abeba: Ethiopian Road Authority; Transport and Road Research Laboratory. Joint Road Research Project.JRRP report 6.
Harvard
Welde-Markos W., . (1976). Terrain evaluation for highway engineering land system mapping of the Lake Abaya area. Addis Abeba: Ethiopian Road Authority; Transport and Road Research Laboratory. Joint Road Research Project.JRRP report 6.
MLA
Welde-Markos W, . Terrain evaluation for highway engineering land system mapping of the Lake Abaya area. Addis Abeba: Ethiopian Road Authority; Transport and Road Research Laboratory. Joint Road Research Project.JRRP report 6. 1976.