Schafer, Ronald William. <br/><br/>
Echo removal by discrete generalized linear filtering   
by Ronald William Schafer. 
 - Massachusetts  MIT  1968 
 - 252p. 
<br/><br/> Massachusetts Institute of Technology, Thesis - Ph.D. 
<br/><br/><label>Dewey Class. No.: </label>621.38043  / N682