Earth science 
[by] Robert L. Heller [and others] 
 - New York,  Webster Division, McGraw-Hill  [1973] 
 - Challenges to science .
<br/><br/> At head of title: Teacher's edition. 
<br/><br/> A science text book for the middle grades which stresses basic, general concepts of earth science, the environment, and space science. 
<br/><br/><label>ISBN: </label>0070280452 
<br/><br/><label>LCCN: </label>73001199 /AC/r86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth sciences -- Juvenile literature.--Earth sciences -- Juvenile literature.<br/>Astronomy -- Juvenile literature.--Astronomy -- Juvenile literature.<br/>Earth sciences.<br/>Astronomy.
<br/><br/><label>LC Class. No.: </label>QE29  / .E27 
<br/><br/><label>Dewey Class. No.: </label>550