TY  - BOOK
AU  - Ur,Penny
TI  - Grammar practice activities: a practical guide for teachers 
SN  - 0521338476 
AV  - PE1128.A2 .Ur1 1988
PY  - 1988///
CY  - Cambridge 
PB  - Cambridge University Press
N1  - Bibliography: p. 283-284
ER  -