TY  - BOOK
AU  - Kelsen, David.
TI  - Gastrointestinal oncology: principles and practices 
SN  - 9780781722308;0781722306
PY  - 2002///
CY  - Philadelphia
PB  - Lippincott, Williams & Wilkins
KW  - Gastrointestinal Neoplasms
N1  - Includes bibliographical references and index
ER  -