1. Bezoars and concretions: a comprehensive review of the literature with an analysis of 303 collected cases and a presentation of eight additional cases;De Bakey;Surg,1939
2. Gastroscopy with the fiberscope;Allegra,1971
3. Fiberendoscopy: removal of a retained sewing needle from the stomach;Gelzayd;Gastrointestinal Endoscopy,1972
4. The use of flexible forceps in the removal of bipronged and other types of foreign objects from the esophagus and stomach;Lell;Ann Otol,1966
5. Safety pin swallowers;Brikett;Brit Med J,1971