TY  - BOOK
AU  - House,Roger
AU  - Gude,Kathy
AU  - Duckworth,Michael
TI  - Proficiency masterclass: Teacher's book 
SN  - 0-19-432913-5
PY  - 2002///
CY  - Oxford
PB  - Oxford University Press
KW  - English Language
KW  - Teacher's book
ER  -