TY  - BOOK
AU  - Richards,Jack C.
TI  - Interchange: english for international communication. Workbook 1 
U1  - 421.5 R516wb 1990 
PY  - 1990///
CY  - Cambridge
PB  - Cambridge University Press, 
KW  - INGLES
KW  - TEXTO DE ESTUDIO
ER  -