Wright, Charles Will,  1879- <br/><br/>
The Porcupine placer district, Alaska, 
by Charles W. Wright. 
 - Washington,  Govt. Print. Off.,  1904. 
 - 35, v p.  illus., 10 pl. (incl. maps)  24 cm. 
 - U.S. Geological survey. Bulletin  no. 236 .
<br/><br/> Subject series: A, Economic geology, 37; B, Discriptive geology, 42. 
<br/><br/><label>LCCN: </label>gs 04000162  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Alaska.<br/>Gold mines and mining--Alaska.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 236