TY  - BOOK
AU  - Ek, Jan Ate Van
AU  - L. G., Alexander
TI  - Threshold level english : in a European unit/credit system for modern language learning by adults
SN  - 0-08-024588-9
CY  - Oxford
KW  - INGLES-ESTUDIO Y ENSEÑANZA; METODOLOGIA/REVISADO
ER  -