Le, Tao, 
First aid for the USMLE Step 2 CK /   First aid for the USMLE step 2 CK (clinical knowledge) : a student-to-student guide.  USMLE step 2 CK.  First aid for the USMLE step two CK.  First aid for the USMLE step two clinical knowledge.  Tao Le, Vikas Bhushan, Maniver Deol, Gabriel Reyes.   - Tenth edition.   - xv, 638 pages :  illustrations (some color) ;  28 cm.