TY  - BOOK
AU  - Mamas,. Lawrence.
AU  - Betsis, Andrew.
TI  - IELTS: the vocabulary files : English usage intermediate : teacher's book : level b1 
T2  - The Council of Europe's Common European Framework
SN  - 9781904663423
CY  - United Kingdom
PB  - Global ELT.
KW  - English language
KW  - usage
KW  - sears
N1  - score: 4.0-4.5 - 5.0
ER  -