1. Appleton, J.L.T., Bacterial Infection, 3rd Ed. ( Philadelphia, Lea and Febiger: 1944 ), page 362.
2. Goadby, K.W., The Mycology of the Mouth, (New York, Longman, Green and Co. 1903), p. 173.
3. Connant, N.F., AND Associates, Manual of Clinical Mycology (Philadelphia, Saunders Co. 1944), p. 142.
4. Benham, R. , Fungi and their Pathogenicity, in GAY's Agents of Disease and Host Resistance, (Baltimore, C. C. Thomas : 1935), Chapt. 45, pp. 1118-1119.