Sagan, Carl. <br/><br/>
Pale blue dot :  a vision of the human future in space / 
by Carl Sagan. 
 - New York, N.Y. :  Random House,  1994. 
 - xviii, 429 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0679438416 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Outer space--Exploration--Popular works.