1. Aaron, C D: Dis. of the Dig. Organs, Lea and Febiger, Phila.
2. Adams, B. A., and Holmes. F. L.: J. Soc. Chem. Ind. 54, 1–6T, 1935.
3. Alpert, S. and Martin, G. J: Unpublished data. Rev. Gastroent.. in press.
4. Alpert, S. and Martin, G. J.: Am. J. Dig. Dis., in press.
5. Alpert, S. and Martin, G. J.: Am. J. Dig. Dis., 16, 10, 1949.