TY  - BOOK
AU  - Davis,Polly
TI  - English structure in focus
SN  - 0883770776
AV  - PE1128 
PY  - 1977///
CY  - Rowley, Mass
PB  - Newbury House
KW  - English language
KW  - Textbooks for foreign speakers
KW  - Programmed instruction
KW  - Programmed instructional materials
KW  - Textbooks
N1  - Includes index
ER  -