@book{872123,
	author = {Soni Ram Chandra and University of Delhi. Faculty of Medical Sciences. Department of Gastroenterology and  Dr. A. S. Puri Gu.},
	title = {To compare the diagnostic yield of fine needle aspiration, surface biopsy and needle knife papillotomy assisted ampullary biopsy in periampullary tumours},
	year = {2009}
}