Sagan, Hans. <br/><br/>
Boundary and eigenvalue problems in mathematical physics / 
Hans Sagan. 
 - New York :  Wiley,  [1961]. 
 - 381 p. :  ill. 
<br/><br/>Includes bibliogr. references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical physics.<br/>Boundary value problems.