TY  - BOOK
AU  - Tilbury,Alex
AU  - Doff,Adrian
TI  - English unlimited: B1 : pre-intermediate : coursebook with e-portfolio 
SN  - 9780521697774
AV  - PE1128.A2 E54 2011
PY  - 2011///
CY  - Cambridge
PB  - Cambridge University Press
KW  - English language
KW  - Study and teaching
KW  - Foreign speakers
KW  - Activity programs
ER  -