Hajek, John..
Universals of sound change in nasalization /

. - Oxford ; Boston  : Blackwell,  1997 
. - XVI, 253 p. : map  23 cm. 
 - ((Publications of the Philological Society, 31) )
<br/>К.: Ббіліогр. : с. 227-246. 
<br/><label>  ISBN: </label>0-631-20456-3