TY  - GEN
AU  - Gibson J.B
AU  - Sobin L.H
TI  - Histological typing of tumours of the liver, biliary tract and pancreas
T2  - International Histological Classification of Tumours No. 20
SN  - 9241760206
PY  - 1978///
CY  - Geneva
PB  - WHO
ER  -