Abercrombie, David. <br/><br/>
Problems and principles in language study / 
by David Abercrombie. 
 - 2d ed. 
 - London :  Longman.  1963. 
 - vii, 83 p. ;  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Languages, Modern--Study and teaching.<br/>English language--Study and teaching--Foreign speakers.