Title: Practical gastrointestinal endoscopy / Peter B. Cotton, Christopher B. Williams; foreword by Marvin H. Sleisenger
Subjects: Gastrointestinal Diseases -, Endoscopy, Diagnosis, Gastroenterology, Endoscope and endoscopy, Gastrointestinal system, Digestive organs, Diseases, Digestive System Diseases, Gastrointestinal Diseases, Endoscopes