Clarke, Otis M. <br/><br/>
Clay and shale of northeastern Alabama, 
by Otis M. Clarke, Jr. 
 - University, Ala.,  1968. 
 - 99 p.  illus., maps (part col., 1 fold. in pocket)  23 cm. 
 - Geological Survey of Alabama. Circular 20-C .
 - Circular (Geological Survey of Alabama) ;  20-C. .
<br/><br/> Prepared in cooperation with U.S. Bureau of Mines. 
<br/><br/>Bibliography: p. 37-39. 
<br/><br/><label>LCCN: </label>gs 68000280 //r84 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Alabama.<br/>Shale--Alabama.
<br/><br/><label>LC Class. No.: </label>QE471  / .C569 
<br/><br/><label>Dewey Class. No.: </label>552/.5