Harrison, Edward <br/><br/>
Darkness at night:  a riddle of the universe. 

 - 293 p.  23cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0-674-19271-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrophysics--History.<br/>Astronomy--History.<br/>Cosmology--History.
<br/><br/><label>Dewey Class. No.: </label>520.9 H246 1987