Campbell, Leon. <br/><br/>
The story of variable stars / 
by Leon Campbell and Luigi Jacchia 
 - Philadelphia :  The Blakiston company,  c1941 [Reprinted 1946] 
 - v, 226 p. :  ill. ;  22 cm. 
 - Harvard books on astronomy .
 - Harvard books on astronomy .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Variable stars
<br/><br/><label>Dewey Class. No.: </label>523.84  / CAS 1946