TY - BOOK TI - USMLE step 2 secrets : questions you will be asked 4th ed AU - O'Connell, Theodore X., author. SN - 9780323188142 (alk. paper) PB - Elsevier/Saunders PP - Philadelphia, PA : Elsevier/Saunders, 2014. PY - 2014 UR - https://library.korea.ac.kr/detail/?cid=CAT000045895924&ctype=m