Ball, W. J. <br/><br/>
Conversational english : an analysis of contemporary spoken english for foreign students : with exercises 

 - London  Longmans  1953 
 - 284 p 
<br/><br/> Includes bibliography 
<br/><br/><br/>Inglés 
<br/><br/><label>Subjects--Topical Terms: </label><br/>/LINGUISTICA/INGLES-USO; EXPRESION ORAL; CONVERSACION/REVISADO/