Leevy, Carroll M., Standardization of nomenclature, diagnostic criteria and diagnostic methodology for diseases of the liver and biliary tract/ Carroll M. Leevy and Niels Tygstrup. - Basel: S. Karger, 1976. - 58 pages ; 22cm. ISBN: 3805522908 Subjects--Topical Terms: Liver--Diseases--Classification.Biliary tract--Diseases--Classification.