TY  - BOOK
AU  - Welch,Claude E.
AU  - Hedberg,Stephen E.
TI  - Polypoid lesions of the gastrointestinal tract
SN  - 0721691714
PY  - 1975///
CY  - Philadelphia
PB  - W. B. Saunders
KW  -  Intestinal polyps
N1  - Includes bibliographies and index
ER  -