Brillouin, Leon, <br/><br/>
Wave propagation and group velocity. 

 - New York,  Academic Press,  1960. 
 - xi,154 p.  illus.  24 cm. 
 - Pure and applied physics,  v. 8 .
 - Pure and applied physics ;  v. 8. .
<br/><br/><label>Subjects--Index Terms: </label>Wave mechanics  Wave-motion, Theory of. 
<br/><br/><label>Dewey Class. No.: </label>530.12  / BRI