You can easily search a majority of the Penn Libraries journal titles about Colorectal Surgery in Browzine.
Gastrointestinal and Urologic Surgery — Surgery — University of Pennsylvania — BrowZine
Below are direct links to a selection of these titles.
Innovative Endoscopic and Surgical Technology in the GI Tract by 
Intracorporeal anastomosis: the definitive guide for the minimally invasive surgeo by 
Laparoscopic Colon Surgery: Milestones, Education, & Best Practice by 
Laparoscopic Colorectal Surgery: Step-by-step guide with video atlas by 
Lower gastrointestinal tract surgery: Vol 2. Open Procedures by 
Anorectal Physiology: A Clinical and Surgical Perspective by 
Minimally Invasive Surgical Techniques for Cancers of the Gastrointestinal Tract: A Step-by-Step Approach by 
