Pearl, Richard Maxwell,  1913- <br/><br/>
Keynotes  geology simplified 
by Richard M. Pearl 
 - New York  Barnes & Noble  1968 
 - 89 p. : ill. ; 27 cm. 
<br/><br/><label>LCCN: </label>68-020688 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Examinations, questions, etc