Investigation the earth :  Earth Science curriculum project / 
The American Geological Institute 
 - Boston :  Houghton Mifflin Company,  1967. 
 - 594 p. :  ill. ;  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth Sciences
<br/><br/><label>Dewey Class. No.: </label>550