Rudaux, Lucien; Vaucouleurs <br/><br/>
Larousse encyclopedia of astronomy 

 -  Prometheus Press, New York  1959 
 - 506 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy & allied sciences
<br/><br/><label>Dewey Class. No.: </label>R 520.03  RUD-L