Ducan, John Charles,    1882- <br/><br/>
Astronomy, a text book /    
By John Charles Ducan ... 
 - 4th ed. 
 - New York :   Harper & brothers,   [1946] 
 - 5 p. l., 500 p.:    incl. front., ill., diagrs. col., pl., charts;    24 cm. 
<br/><br/>  "The first edition appeared in 1926." 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--------
<br/><br/><label>Dewey Class. No.: </label>520 DUN