TY  - BOOK
AU  - Thomson, A J
TI  - Practical English grammar: exercise 1
SN  - 0194421228
U1  - E45 M0 
PY  - 1980///
CY  - Oxford
PB  - Oxford University Press
KW  - English language - Textbooks for foreign speakers
KW  - English language - Grammar - Problems, exercises, etc
ER  -