@book{3884, author = {Yamada, Tadataka.}, title = {Textbook of gastroenterology}, publisher = {Lippincott Williams & Wilkins,}, year = {1999.}, address = {Philadephia :}, edition = {3rd ed.}, url = {https://www.google.com.pk/search?tbm=bks&hl=en&q=9780397587353} }