Davis, Polly,  1930- <br/><br/>
English structure in focus / 
Polly Davis. 
 - Rowley, Mass :  Newbury House,  1977. 
 - xv, 375 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0883770776 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--Textbooks for foreign speakers.<br/>English language--Programmed instruction.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Programmed instructional materials.<br/>Textbooks.
<br/><br/><label>LC Class. No.: </label>PE1128