TY  - BOOK
AU  - Richards,Jack C.
AU  - Hull,Jonathan
AU  - Proctor,Susan
TI  - Interchange  : english for international communication : teachers manual  
SN  - 0521359899
AV  - PE1128 .R525 1992
PY  - 1992///
CY  - New York  
PB  - Cambridge university Press, 
KW  - Ingles
KW  - Texto para extranjeros
ER  -