First aid Q & A for the USMLE step 1 / senior editors, Tao Le, James A. Feinstein. - 3rd ed. - New York : McGraw-Hill, 2012. - xiii, 765 p. : ill. ; 28 cm. ISBN: 9780071744027 RM65.73 Subjects--Topical Terms: Medicine.Licensure, Medical. Index Terms--Genre/Form: Examination Questions.