Heading, J.  x <br/><br/>
An Introduction to phase-integral methods.  x 

 - x 
 - London  Wiley  1962 
 - 160 
<br/><br/>x 
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Waves Mathematical Physics 
<br/><br/><label>Dewey Class. No.: </label>517.3/HEI