TY  - BOOK
AU  - Betsis, Andrew.
AU  - Mamas, Lawrence.
TI  - IELTS: the vocabulary files : English usage advanced : students book : c1 
SN  - 9781904663454
CY  - United Kingdom
PB  - Global ELT.
KW  - English language
KW  - usage
KW  - sears
N1  - Score: 6.0 - 6.5 - 7.0
ER  -