TY  - BOOK
AU  - O'Sullivan ,Desmond
AU  - Swan,Michael
AU  - Walter,Catherine
TI  - The new cambridge english course: test book 4, upper-intermediate 
SN  - 0521376726
U1  - 428 
PY  - 1993///
CY  - New York
PB  - Cambridge University Press
KW  - English language
KW  - Study and teaching
ER  -