Anttila, Raimo. <br/><br/>
Proto-Indo-European schwebeablaut / 
by Raimo Anttila. 
 - Berkeley ;  Los Angeles :  University of California Press,  1969. 
 - xvii, 238 p.  26 cm. 
 - University of California publications in linguistics  v. 58 .
 - 410 .
<br/><br/> A revision of the author's thesis, Yale, 1966. 
<br/><br/>Bibliography: p. 179-194. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proto-Indo-European language--Vowel gradation.<br/>Indo-European languages--Vowel gradation.
<br/><br/><label>Dewey Class. No.: </label>410