Kaufmann, William J. <br/><br/>
Astronomy :  the structure of the universe / 
William J. Kaufmann 
 - New York :  Macmillan Publishing Co.,  1977 
 - 491 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>0023621303 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy