REFERENCES
- Cawston, F. G. (1921). Experimental Infestation of Fresh-water Snails. Trans. Royal Society of South Africa, Vol. IX, Pt. 4, p. 301.
- Cawston, F. G. (1921). Three Schistosomes in Natal which possibly attack Man. Journ. Trop. Med. and Hyg., Vol. XXIV, No. 18, pp. 242–244.