TY  - GEN
AU  - House, Roger
AU  - Duckworth, Michael
AU  - Gude, Kathy
TI  - Profinciency masterclass: techer's book
SN  - 019432913
U1  - 420.044 
PY  - 2002///
CY  - New York
PB  - Oxford University Press
KW  - Proficiency
ER  -