1. Modern Trends in Gastroenterology;Belsey,1952
2. Reflux esophagitis, sliding hiatal hernia, and anatomy of repair;Allison;Surg. Gynec. & Obst.,1951
3. Bedside Diagnosis;Crump,1928
4. Dysphagia produced by contractile ring in lower esophagus;Ingelfinger;Gastroenterology,1953
5. Incidence of hiatus hernia in patients without symptoms;Brick;Arch. Surg.,1950