Irion, Robert. <br/><br/>
Galaxies :  island universes / 

 - Pleasantville :  Reader's Digest,  2001. 
 - 66  pages. 
 - Out there .
<br/><br/><label>ISBN: </label>0762103124 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.<br/>Density wave theory.<br/>Galaxies.<br/>Space sciences.
<br/><br/><label>LC Class. No.: </label>QB857.I75