Pearl R M <br/><br/>
Geology 

 -  1960 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>47506 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Stratigraphy<br/>Geology
<br/><br/><label>Dewey Class. No.: </label>H5, K0