TY  - BOOK
AU  - Polly Davis
TI  - English Structure in Focus
SN  - 0883770776
AV  - PE1128 .D35
U1  - 428/.2/4 
PY  - 1977///
CY  - USA
PB  - Newbury House
KW  - English
KW  - General
KW  - Textbooks for foreign speakers
KW  - English language
KW  - Programmed instruction
KW  - Languages اللغات
ER  -