Tombaugh, Clyde W <br/><br/>
Out of the darkness  the planet pluto 
Clyde W Tombaugh and Patrick Moore 
 - Harrisburg  Stackpole Books  1980 
 - 221p. 
<br/><br/><label>ISBN: </label>0-8117-1163-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and astrophysics thesaurus<br/>Planetary systems<br/>Planets-Pluto<br/>Solar system
<br/><br/><label>Universal Decimal Class. No.: </label>523.482  / TOM