Stetson Harlan True <br/><br/>
Sunspots in action   
  

 - 
 - New York  Ronald Press  1947 
 - 252, 21.8 cms, index, graphs 
<br/><br/> B   
<br/><br/>  
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Specific Celestial Bodies & Phenomena
<br/><br/><label>Dewey Class. No.: </label>523.7 ste/sun