Heller, Robert, et al. <br/><br/>
Challenges to science: Earth science / 
Heller, Robert, et al. 
 - 2 ed. 
 -  Webster Division, McGraw-hill Book Company,  1979 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sciences of earth & other worlds
<br/><br/><label>Dewey Class. No.: </label>550 HEL-C2