AU  - O'Connell, Sue
TI  - Focus on first certificate
SN  - 0003700518
U1  - 428.2 OCO 
PY  - 1991///
CY  - U.K.
PB  - HarperCollins Publishers
KW  - Standard English usage
KW  - İngilizce'nin kullanımı
KW  - English language --Textbooks for foreign speakers
KW  - English language --Grammar
KW  - English language --Grammar --Problems, exercises, etc
N1  - includes index. (220 - 221 p.)
ER  -