1. Alvarez, W. C.: “Irritable Colon or Mucous Colitis,” The Oxford Medicine, Oxford Press, N.Y., vol. 3, p. 302 (21).
2. Ibid.
3. Wiggins, C. I.: Physiology in Health & Disease, Lea-Febiger 1944.
4. Alvarez, W. C.: Introduction to Gastroenterology.-P. B. Hoeber, 1939.
5. Craig, C. F. and Faust: Clinical Parasitology. 3rd Edition, Philadelphia, 1943.