Investigating the earth. 

 - Boston,  Houghton Mifflin  [1967] 
<br/><br/> Sponsored by the American Geological Institute; supported by the National Science Foundation. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>67008738 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth sciences.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Earth.
<br/><br/><label>LC Class. No.: </label>QE501  / .E22 
<br/><br/><label>Dewey Class. No.: </label>550