Campbell Leon <br/><br/>
Story of variable stars 
Campbell Leon; Jacchia Luigi 
 -  1945 
 - p.  cm. 
 - Harvard books on astronomy; 4 .
<br/><br/><label>Standard No.: </label>25687 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics
<br/><br/><label>Dewey Class. No.: </label>B96:6, H5