You can easily search a majority of the Penn Libraries journal titles about Gastroenterology Surgery n Browzine.
Gastrointestinal and Urologic Surgery — Surgery — University of Pennsylvania — BrowZine
Below are direct links to a selection of these titles.
Clinical Pancreatology for Practising Gastroenterologists and Surgeons by 
Gastrointestinal Interventional Endoscopy: Advanced Techniques by 
Gastroparesis: A Comprehensive Approach to Evaluation and Management by 
Management of Gastroesophageal Reflux Disease: Surgical and Therapeutic Innovations by 
The Perfect Sleeve Gastrectomy: A Clinical Guide to Evaluation, Treatment, and Techniques by 
The Ileoanal Pouch: A Practical Guide for Surgery, Management and Troubleshooting by 
The Internist's Guide to Minimally Invasive Gastrointestinal Surgery by 
Bariatric Therapy: Alliance between Gastroenterologists and Surgeons by 
