Sohn, I. G.  1911-2000. <br/><br/>
Industrial clays other than potential sources of alumina of the Columbia Basin. 

 - Washington,  1952. 
 - 18 p.  2 fold. col. maps (in pocket) tables.  27 cm. 
 - Geological Survey circular 158. .
<br/><br/>"References": p. 2-3. 
<br/><br/><label>LCCN: </label>gs 53000081  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Columbia River Valley.
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 no. 158 
<br/><br/><label>Dewey Class. No.: </label>553.6