1. Endoscopic Colour Atlas of Gastric Diseases.;Ashizawa,1971
2. Endoscopic examination of the duodenal bulb: a comparison with x-ray;Belber;Gastroenterology,1971
3. Gastroscopic electrosurgery;Blackwood;Gastroenterology,1971
4. Multiple gastric ulcers;Boyle;Gastroenterology,1971
5. Duodenoscopy: initial experience with 135 examinations;Cavallaro;Gastroenterology,1971