Trask, R. L.  1944- <br/><br/>
Why do languages change? / 
R.L. Trask ; revised by Robert McColl Millar. 
 - Cambridge :  Cambridge University Press,  c2010. 
 - xi, 198 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 187-189) and index. 
<br/><br/><label>ISBN: </label>9780521838023 (hbk.)  RM273.68 0521838029 9780521546935 (pbk.) 0521546931 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English language--History.