TY  - BOOK
AU  - Daugherty, Steven R
TI  - USMLE step 1 Qbook
SN  - 9781419553158
U1  - 610.76 DAU 
PY  - 2008///
CY  - New York
PB  - Kaplan Publishing
KW  - USMLE-questions and answer
ER  -