Brocklehurst, M <br/><br/>
Physical sciences: level populations of excited States of hydrogen in gaseous nebulae.  [electronic resource] 

 -  Nature  Feb 1970 
 - 618-9 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0028-0836 
<br/><br/><label>Standard No.: </label>10.1038/225618a0  doi