Duff, Charles, 1894-  Duff, Charles, 1894- <br/><br/>
How to learn a language :  a book for beginners and all others who may be interested. 

 - Oxford :  B. Blackwell,  1948. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages -- Study and teaching.--Language and languages -- Study and teaching.<br/>Languages, Modern -- Study and teaching.--Languages, Modern -- Study and teaching.