RT Journal Article SR Electronic T1 Carcinoma of the gallbladder or extrahepatic bile ducts: the role of radiotherapy JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 59 OP 61 VO 118 IS 1 A1 Hanna, S. S. A1 Rider, W. D. YR 1978 UL http://www.cmaj.ca/content/118/1/59.abstract