TY  - BOOK
AU  - Powell,Lawrie W.
AU  - Piper,Douglas W.
TI  - Fundamentals of gastroenterology: with self-assessment workbook 
SN  - 0909337268
PY  - 1980///
CY  - New York
PB  - ADIS Press
KW  - Gastroenterology
ER  -