Sommerfeld, Arnold, 1868-1951.  Sommerfeld, Arnold, 1868-1951. <br/><br/>
Partial differential equations in physics / 
Arnold Sommerfeld. 
 - New York :  Academic Press,  c1964. 
<br/><br/> Translation of: Partielle Differentialgleichungen der Physik. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.<br/>Mathematical physics.