Clarke, Otis M. <br/><br/>
Clay and shale of northwestern Alabama, 
by Otis M. Clarke, Jr. 
 - University, Ala.,  Geological Survey of Alabama, Division of Economic Geology,  1966. 
 - 88 p.  illus., maps (part col., 1 fold. in pocket) port.  23 cm. 
 - Geological Survey of Alabama. Circular 20B .
 - Circular (Geological Survey of Alabama) ;  20B. .
<br/><br/> Prepared in cooperation with the Bureau of Mines, U.S. Dept. of the Interior. 
<br/><br/>Bibliography: p. 33-34. 
<br/><br/><label>LCCN: </label>gs 66000313 //r932 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Alabama.<br/>Shale--Alabama.
<br/><br/><label>LC Class. No.: </label>TN942  / .C55 
<br/><br/><label>Dewey Class. No.: </label>553/.61/09761