Report. 1950- 

 - [Columbus] 
 - v.  illus., ports., maps.  23 cm. 
 - Its Information circular .
 - Ohio.  Division of Geological Survey.  Information circular. .
<br/><br/><label>LCCN: </label>gs 51000143  
<br/><br/><label>LC Class. No.: </label>QE151  / .A183 Subser. 
<br/><br/><label>Dewey Class. No.: </label>557.71