LITERATURE CITED
- Faure, J. C., 1943.—Union of S. Africa. Dept. Agr. Science Bull. 234.
- Hattingh, C. C., 1941.—Union of S. Africa Dept. Agr. Science Bull. 217.
- Hudson, J. R., 1943.—J. East Africa Nat. Hist. Soc. XVII, pp. 125–127.
- Jack, R. W., 1930.—S. Rhodesia Dept. Agr. Bull. 796.
- Luganbill, P., 1928.—U.S. Dept. Agr. Tech. Bull. 34.