Ruhlen, Merritt,  1944- <br/><br/>
The origin of language :  tracing the evolution of the mother tongue / 
Merritt Ruhlen 
 - Canada :  Wiley,  c1994 
 - xi, 239 p. :  ill., maps ;  25 cm. 
<br/><br/>Includes bibliographical references (p. 216-224) and index. 
<br/><br/><label>ISBN: </label>0471159638 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages--Origin.<br/>Language and languages--Classification<br/>Human evolution
<br/><br/><label>Subjects--Index Terms: </label>Ngôn ngữ Tiếng mẹ đẻ 
<br/><br/><label>Dewey Class. No.: </label>401  / RUH 1994