Author : Brown, Barnum.Currie, Ethel Dobbie.
Year : 1920 – 1921
pt. 1. The Dudley Expedition / by Barnum Brown. The Harrar Plateau. Crystalline basement. The Adigrat sandstone. Upper Jurassic limestones. Cretaceous deposits. Nubian sandstone(?). Tertiary and Quaternary deposits. The Dirre Daua region. The Hargeisa, British Somaliland, region — pt. 2. Echinoidea / by Ethel D. Currie. Jurassic Echinoidea from Ethiopia. Cretaceous Echinoidea from Ethiopia. Eocene Echinoidea from British Somaliland.