TY  - BOOK
AU  - Edmundowicz,Steven
TI  - 20 common problems in gastroenterology
SN  - 0070220557 :
PY  - 2002///
CY  - New York
PB  - McGraw- Hill
KW  - Gastrointestinal diseases
KW  - Diagnosis
KW  - therapy
ER  -