TY  - BOOK
AU  - Hover,David
TI  - Think twice: communication activities for beginner to intermediate students. Teacher's book 
SN  - 0521273854 (Student's book)
AV  - PE1128 H68 1986
PY  - 1986///
CY  - New York
PB  - Cambridge University
KW  - Inglés
KW  - Manuales, etc
KW  - Estudio y enseñanza
N1  - t.1. Student's book  --  t.2. Teacher's book
ER  -