TY  - BOOK
AU  - De la Vega Sara Lequerica
AU  -  Salazar, Carmen
TI  - Avanzando: 
SN  - 0-471-20286-x.
AV  - PC4112.D38 
CY  - Hoboken
KW  -  Spanish Language--grammar
KW  -  Speaker--English
KW  - Language and Literature
KW  - Spanish Language--Text book for foreigners
ER  -