Earth science 
by Robert L. Heller, et al… 
 - New York,  McGraw-Hill Book Company  c1973. 
 - xi, 468 p.  illus.  25 cm. 
 - Challenges to science .
<br/><br/> A science text book for the middle grades which stresses basic, general concepts of earth science, the environment, and space science. 
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<br/><br/><label>ISBN: </label>0070280452 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth sciences — Juvenile literature.<br/>Astronomy — Juvenile literature.<br/>Earth sciences.<br/>Astronomy.
<br/><br/><label>Dewey Class. No.: </label>Cir 550 C35 1973