TY - BOOK TI - Step-up : a high yield, systems-based review for the USMLE step 1 SN - 0-683-30755-X U1 - 616.0076 M4987 2000 PB - Lippincott Williams & Wilkins KW - Clinical medicine -- United States -- Examinations N1 - 600 Technology (App Sciences) ER -