Haar, D. Ter <br/><br/>
The Old Quantum theory 

 - Oxford  Pergamon Press  1967 
 - 206 
<br/><br/><label>Publisher. No.: </label> Select 
<br/><br/><label>Subjects--Personal Names: </label> Physics 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics