TY  - BOOK
AU  - Hashemi,Louise
AU  - Thomas,Barbara
TI  - Objective PET: student's book 
U1  - 428.007 1 H348o 2003 
PY  - 2003///
CY  - Cambridge
PB  - Cambridge University Press, 
KW  - INGLES
KW  - ENSEÑANZA
KW  - PROBLEMAS, EJERCICIOS, ETC
N2  - 12th printing: 2009; 14th printing: 2010
ER  -