TY  - BOOK
AU  - Herrera, Mario
TI  - Backpack 1/ Teacher´s edition
SN  - 9780132451246
U1  - 428.07H565t1 
PY  - 2009///
CY  - [U.S.A]
PB  - Pearson
KW  - Teacher´s Guide
KW  - English
ER  -