Bickerton, Derek <br/><br/>
Roots of language / 
Derek Bickerton 
 - Ann Arbor :  Karoma Publishers,  1981 
 - 351 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0897200446 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages--Origin