Standage, Tom <br/><br/>
The neptune file :  planet detectives and the discovery of worlds unseen / 
Tom Standage 
 - London, Eng. :  Penguin Books,  2000 
 - xi, 214 p. :  ill. ;  20 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0140294643 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Planetology