Symposium on nizamiah observatory on binary & multiple systems( Hyderabad,1983) <br/><br/>
Binary and multiple systems   
ed. by K.D.Abhyankar, G.M.Ballabh 
 - Hyderabad  Osmania University  1984 
 - iii, 160p. 
<br/><br/><label>Dewey Class. No.: </label>523.841  / N84