TY  - BOOK
AU  - Duckworth,Michael
TI  - At your service: english for the travel and tourist industry. Workbook 
U1  - 421.5 D836wb 1995 
PY  - 1995///
CY  - Oxford
PB  - Oxford University Press, 
KW  - INGLES
KW  - TEXTO DE ESTUDIO
ER  -