Caplan, W. M. <br/><br/>
Subsurface geology of northwestern Arkansas. 

 - Little Rock,  1957. 
 - iv, 14 p.  maps (part fold.) tables.  28 cm. 
 - Arkansas.  Geological and Conservation Commission.  Information circular 19 .
 - Arkansas Geological and Conservation Commission .
<br/><br/>Bibliography: p. 9. 
<br/><br/><label>LCCN: </label>gs 57000218  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Arkansas.<br/>Geology--Arkansas--Maps.<br/>Geology, Stratigraphic.
<br/><br/><label>LC Class. No.: </label>QE87  / .A3 no. 19 
<br/><br/><label>Dewey Class. No.: </label>557.67