Sagan, Carl ,1934- Leonard, Jonathan Norton , 1903- <br/><br/>
Planets 
by Carl Sagan, Jonathan Norton Leonard, and the editors of Time-Life Books. 
 -  Time-Life Books New York  1972  [1972] 
 - 200 p.illus.28 cm. 
 - Life science library .
<br/><br/> Bibliography: p. 195. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Planets.--QB
<br/><br/><label>LC Class. No.: </label>QB601.S34 1972