Rockwood and Matsen's the shoulder /   Shoulder  editors, Frederick A. Matsen III, Frank A. Cordasco, John W. Sperling, Steven B. Lippitt ; associate editors, Samuel Antuņa, Aaron J. Bois, Jason E. Hsu, Bradford O. Parsons ; editor emeritus, Charles A. Rockwood Jr.   - 1 online resource :  illustrations (some color)