1. Gallstone obstruction of the intestine;Anderson;Surg Gynecol Obstet,1967
2. Gastro-Intestinal Obstruction;Cantor,1957
3. The therapeutic action of oral Hypaque in bowel obstruction;Cohen;Am J Roentgenol,1967
4. Significance of fluid levels in x-ray films of the abdomen;Donahue;N Engl J Med,1958
5. The chest roentgenogram in the diagnosis of acute abdominal disease;Freimanis;Radiol Clin N Am,1964