Boer, Bart De. <br/><br/>
The Origins of vowel systems / 
Bart De Boer 
 - New York :  The Oxford University Press,  2001 
 - xii, 168 p. :  chart ;  24 cm. 
 - Studies in the evolution of language .
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 145-153 
<br/><br/><label>ISBN: </label>0198299656 :  35.00 0198299664 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vowels<br/>Language and languages--Origin<br/>Language acquisition<br/>Language and languages--Study and teaching
<br/><br/><label>Dewey Class. No.: </label>415