TY  - BOOK
AU  - Duckworth,Michael
AU  - Turner,Rebecca
TI  - Business result: upper-intermediate Student's Book 
SN  - 9780194739405
U1  - 428.34 
PY  - 2008///]
CY  - Oxford
PB  - Oxford University Press
KW  - INGLES
KW  - GRAMATICA
KW  - PROBLEMAS, EJERCICIOS, ETC
ER  -