Sommerfeld, Arnold, 1868-1951.  Sommerfeld, Arnold, 1868-1951. <br/><br/>
Atomic structure and spectral lines / 
translated from the 3rd German ed. by Henry L. Brose. 
 - 2nd ed. 
 - London :  Methuen,  [1928] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Matter -- Constitution.--Matter -- Constitution.<br/>Atoms.<br/>Spectrum analysis.