Ries, Heinrich,  1871-1951. <br/><br/>
The clay deposits of Kentucky.  An economic consideration of the pottery, brick, and tile clays, fire clays, and shales of Kentucky, with notes on their industrial development, 
by Heinrich Ries ... Illustrated with sixty-three photographs, maps, and diagrams. 
 - 1st ed.,  500 copies. 
 - Frankfort, Ky.,  The Kentucky Geological survey,  1922. 
 - [9], 241 p.  illus., fold. maps, tables.  24 cm. 
 - Kentucky. Geological survey, 1920-  Series 6. [Geologic reports]  v.8 .
<br/><br/>Bibliography: p. 234-235. 
<br/><br/><label>LCCN: </label>gs 22000404  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Kentucky
<br/><br/><label>LC Class. No.: </label>TN942  / .R383