TY  - BOOK
AU  - Gude, Kathy
AU  - Duckworth, Michael
TI  - Proficiency masterclass ( Teacher's book )
SN  - 0194328244
U1  - 428.24 
PY  - 1994///
CY  - Oxford
PB  - Longman
KW  - English (language) - Study and teaching
N1  - 002591; It 133
ER  -