Sarma, Rathin <br/><br/>
Studies on long term variability of active galactic nuclei and o vi absorption in the interstellar medium / 
Rathin Sarma. 
 - Tezpur:  Tezpur University,  2015. 
 - vi, 143p.; 28cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>334 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics
<br/><br/><label>Dewey Class. No.: </label>530 SAR