Trask, R.L.  . <br/><br/>
Why do languages change? /  
by R.L. Trask. 
 - Cambridge :   Cambridge University Press ,   2010 
 - xi, 198p ;  
<br/><br/><label>ISBN: </label>978-0-521-83802-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Languages change
<br/><br/><label>Dewey Class. No.: </label>P  / Q0