Twenhofel, William H.  1875-1957. <br/><br/>
Origin of the black sands of the coast of southwest Oregon, 
by W. H. Twenhofel. 
 - [Portland]  1943. 
 - 25 p.  illus., maps.  28 cm. 
 - Oregon. Dept. of Geology and Mineral Industries. Bulletin  no. 24 .
<br/><br/>Bibliography: p. 25. 
<br/><br/><label>LCCN: </label>gs 43000028  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Black sand--Oregon.<br/>Sedimentation and deposition--Oregon.<br/>Geology--Oregon.
<br/><br/><label>LC Class. No.: </label>QE155  / .A3 no. 24 
<br/><br/><label>Dewey Class. No.: </label>558.62