TY  - BOOK
TI  - Step-up: A high-yield,systems-based review for the usmle step 1
SN  - 068330755x
AV  - R834.5 .M45 1999
PY  - 1999///
CY  - Philadelphia
PB  - Lippincott Willams&Wilkins
N1  - Includes bibliographical reference and Index
ER  -