TY  - BOOK
AU  - Johanson,John F.
TI  - Gastrointestinal diseases: risk factors and prevention 
SN  - 0397587813
PY  - 1997///
CY  - Philadelphia
PB  - Lippincott-Raven Publishers
KW  - Gastrointestinal Diseases
KW  - prevention and control
KW  - Risk factors
N1  - Includes bibliographical refrences
ER  -