1. Hufford, A. R. Integrative esophagogastroscopy.Am. J. Gastroenterol. 22:116, 1954.
2. Brick, J. B., andPalmer, E. D. Comparison of esophagoscopic and roentgenologic diagnosis of esophageal varices in cirrhosis of the liver.Am. J. Roentgenol. 73:387, 1955.
3. Zaino, C. Oil contrast studies of the lower esophagus.Am. J. Roentgenol. 67:942, 1952.
4. Zimmerman, S. L.,et al. An analysis of 200 admissions for massive upper gastrointestinal bleeding.Ann. Int. Med. 45:653, 1956.
5. Wirts, C. W., andBodi, T. Management of hemorrhaging gastroduodenal ulcer.J.A.M.A. 163:1229, 1957.