Hazard, C. <br/><br/>
Active galactic nuclei 

 - Cambridge:  Cambridge University Press  1979 
 - 317p. :   il; 24 cm. 
<br/><br/> Based on the proceedings of a Nato Advanced Study Institute of Astronomy. University of Cambridge, august 1977 
<br/><br/><label>ISBN: </label>0-521-22494-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrofísica<br/>Guasars<br/>galaxias<br/>agn<br/>astrofísica nuclear