Sagan, Carl,  1934-, <br/><br/>
Pale blue dot :  a vision of the human future in space / 
Carl Sagan. 
 - xviii, 429 pages :  illustrations ;  23 cm. 
<br/><br/>References : page [406]-411. 
<br/><br/><label>ISBN: </label>0679764860  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Outer space--Exploration.<br/>Astronomy.