Map of the southern frontier of Abyssinia.
Great Britain.War Office.General Staff.Geographical Section.
Southampton, England : Ordnance Survey Office,
1909.
Relief shown by contours and spot heights.
"This map is based on a triangulation executed by Capt. Maud, R.E. (1904), extended by Capt. Waller, R.E., 1908."
"The topography is mainly from plane-table sketches executed by Khan Sahib Sher Jung, 1904, and by Major Gwynn, R.E., 1909."