Internal medicine is the branch and specialty of medicine concerning the diagnosis and nonsurgical treatment of diseases in adults, especially of internal organs.
Doctors of internal medicine, also called "internists", are required to have included in their medical schooling and postgraduate training at least three years dedicated to learning how to prevent, diagnose, and treat diseases that affect adults.
Harrison's Principles of Internal Medicine 16th Edition (Single Volume) (Hardcover)
Harrison's Principles of Internal Medicine 16e (Two-Volume Set) (Hardcover)
Harrison's Principles of Internal Medicine 17th edition (Single Volume)
CURRENT Medical Diagnosis and Treatment 2008
Pocket Medicine: The Massachusetts General Hospital Handbook of Internal Medicine