The Nile Basin, volume 3 - Hurst, H. E. (Harold Edwin), b. 1880 (Government Press, 1954)
Some vols. accompanied by supplements.
3d suppl. to v. 3 by H. E. Hurst and R. P. Black; 4th and 5th suppl. by H. E. Hurst, Y. M. Simaika and R. P. Black, 6th and 7th suppl. by Nile Control Staff