TY  - BOOK
AU  - Pack,Alice C.
TI  - Verb choices and verb forms : : dyad learning program: tutor's book 
SN  - 0883770806
AV  - PE1129.S8 P33 1977
PY  - 1977///
CY  - Massachusetts
PB  - Newbury House Publishers, 
KW  - Lemb
KW  - Gramática
KW  - Verbos
KW  - Inglés
ER  -