REFERENCES
- Polya, E.: Arch. f. d. ges. Physiol. 121: 483, 1908.
- Rich, A. R., and Duff, G. L.: Bull. Johns Hopkins Hosp. 58: 212, 1936.
- Opie, E. L.: Bull. Johns Hopkins Hosp. 12: 182, 1901.
- Coffey, R. J.: M. Ann. District of Columbia 11: 131–136 (April) 1942.
- Gillespie, J. F., Brinig, F. J., Freis, E. P., and Coffey, R. J.: Gastroenterology (in press).
- Coffey, R. J., Koppanyi, T., and Linegar, C. R.: Am. J. Digest. Dis. 7: 21, 1940.
- Gage, M., and Floyd, M. D.: Tr. South. S. A. 59: 415–442, 1948.