TY  - BOOK
AU  - Murphy,Raymond
TI  - Essential grammar in use: a reference and practice book for elementary students 
SN  - 0521357713 (pbk) 
U1  - 425 21
PY  - 1990///
CY  - Cambridge
PB  - Cambridge University Press, 
KW  - English language
KW  - Grammar
KW  - 1950-
ER  -