Ballweg, Ruth Physician assistant : a guide to clinical practice (fifth edition) By Ruth Ballweg ; edward M. Sullivan ; Darwin Brown ; Daniel T. Vetrosky - 5th edition - Philadelphia Elsevier Saunders 2013 - xviii, 774 pages : illustrations ISBN: 9781455706570 Subjects--Topical Terms: PHYSICIANS' ASSISTANTSCLINICAL COMPETENCE LC Class. No.: R 697 Bal