REFERENCES
- Hornby, H. E.—E. Afr. Agric. J., 1 (1935–36), 353.
- Staples, R. R., Hornby, H. E. and Hornby, R.M.—E. Afr. Agric. J., 8 (1942–43), 62.
- Lowe, H. J,—E. Afr. Agric. J., 8 (1942–43), 238.
- Ritzman, E. G., Washburn, L. E. and Benedict, F. G.—New Hampshire Agric. Exp. Stat. Tech. Bull. 66 (1936).
- Gaines, W. L.—Rpt. Illinois Agric. Exp. Stat. (1937–38), 141.
- French, M. H.—E. Afr. Agric. J., 8 (1942–43), 126.
- Woodman, H. E.—Min. Agric. Fish. (Eng.) Bull. No. 48 (1932).