Stumpff, Karl <br/><br/>
Planet earth 
Karl Stumpff 
 - Michigan  University of Michigan  1959 
 - 191p.  Pbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.<br/>Earth ---Juvenile literature
<br/><br/><label>LC Class. No.: </label>QB631 .S8 1959