TY  - BOOK
AU  - Murphy,Raymond,1946-
TI  - Essential grammar in use : a self-study reference and practice book for elementary students of english. With answers
SN  - 0-521-35770-5
U1  - 425/M957e 
PY  - 1990///
CY  - Cambridge, Gran Bretaña 
PB  - Cambridge University Press
KW  - LENGUA INGLESA - GRAMATICA
ER  -