Tucker, Wallace <br/><br/>
The X-ray universe / 
Wallace Tucker, Riccardo Giacconi. 
 - Cambridge ;  London :  Harvard University Press,  1985. 
 - 201 p. 
 - Harvard books on astronomy .
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0-674-96285-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>X-ray astronomy