TY  - BOOK
AU  - Thomson,A.J.
AU  - Martinet,A.V.
TI  - A practical english grammar structure drills 1
SN  - 019431345X
AV  - PE1645 .E8  T46 1990 
PY  - 1990///
CY  - New York : 
PB  - Oxford University Press, 
KW  - lemb
KW  - Gramatica
KW  - Ingles
ER  -