Observational evidence of activity in galaxies : proceedings of the 121st symposium of the international astronomical union held in Byurakan, Armenia, U.S.S.R / 
edited by E. Ye. Khachikian, K. J. Fricke and J. Melnick. 
 - 601 páginas. 
<br/><br/><label>ISBN: </label>9027724733 
<br/><br/><label>Subjects--Topical Terms: </label><br/>FUENTES RADIOELECTRICAS (ASTRONOMIA)
<br/><br/><label>Dewey Class. No.: </label>523.1