Fröman, Nanny. <br/><br/>
Physical problems solved by the phase-integral method  [electronic resource] / 
Nanny Fröman and Per Olof Fröman. 
 - Cambridge ;  New York :  Cambridge University Press,  2002. 
 - xiii, 214 p. 
<br/><br/>Includes bibliographical references (p. 205-208) and indexes. 
<br/><br/><br/>Electronic reproduction. <br/>Palo Alto, Calif. : <br/>ebrary, <br/>2013. <br/>Available via World Wide Web. <br/>Access may be limited to ebrary affiliated libraries. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>WKB approximation.<br/>Wave equation.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>QC20.7.W53  / F77 2002eb 
<br/><br/><label>Dewey Class. No.: </label>530.12/4