"Die untersuchungen ... in diesem buche ... betreffen hauptsächlich die nordgrenzen Abyssiniens."--p.  Available also through the Library of Congress Web site as a raster image.
Munzinger, Werner - Thomas Leiper Kane Collection (Library of Congress. Hebraic Section)
Lewis, Roy - Foy, Yvonne - John Bartholomew and Son
Africa: Ethnolinguistic groups. 10-70.
Scale 1:10,400,000. "Principal source: Africa, Its peoples and their culture history, G.P. Murdock." "77465." Includes table of ethnic groups. Available also through the Library of Congress Web site as a raster image. AACR2
United States. Central Intelligence Agency