Struve, Otto <br/><br/>
Astronomy of the 20th century 
[by] Otto Struve and Velta Zebergs. 
 - New York  Macmillan  [1962] 
 - 544 p.  illus.  24 cm. 
<br/><br/><label>LCCN: </label>62021206 /L/r83 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--History.
<br/><br/><label>LC Class. No.: </label>QB32  / .S8 
<br/><br/><label>Dewey Class. No.: </label>520.904