Purington, Chester Wells,  1871- <br/><br/>
Methods and costs of gravel and placer mining in Alaska / 
by Chester Wells Purington. 
 - Washington,  Govt. Print. Off.,  1905. 
 - 273, vii p. :  ill., xlii pl. (2 fold. incl. map) diagrs. ;  24 cm. 
 - U.S. Geological survey. Bulletin  no. 263 .
 - Geological Survey (U.S.).  Bulletin ;  no. 263. .
<br/><br/> Subject series: A, Economic geology, 55.  "Notes on dredging, by J. P. Hutchins": p. 173-190.  Includes index. 
<br/><br/>Bibliography: p. 261-262. 
<br/><br/><label>LCCN: </label>gs 05000909  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gold mines and mining--Alaska.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 263