Wilson, Hewitt,  1891- <br/><br/>
Preliminary report of some of the refactory clays of western Oregon, 
by Hewitt Wilson and Ray C. Treasher. 
 - [Portland, Ore.]  1938. 
 - iv, 93 p.  illus., maps.  28 cm. 
 - Oregon. State Dept. of Geology and Mineral Industries. Bulletin  no. 6 .
<br/><br/> "This paper presents the results of work done under a cooperative agreement between the Bureau of Mines, the University of Washington and the Oregon State Department of Geology and Mineral Industries."  Photoprinted. 
<br/><br/>Bibliographical foot-notes. 
<br/><br/><label>LCCN: </label>gs 38000173  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Oregon.<br/>Clay industries--Oregon.
<br/><br/><label>LC Class. No.: </label>TN942  / .W54 
<br/><br/><label>Dewey Class. No.: </label>285 s  B no. 6