Twenhofel, William Stephens,  1918- <br/><br/>
Geology of proposed Blue Lake dam site and tunnel near Sitka, Alaska. 

 - [Washington]  1951. 
 - 4 p.  maps (1 fold., in pocket)  26 cm. 
 - Geological Survey circular 147 .
 - Geological Survey circular ;  147. .
<br/><br/> Cover title. 
<br/><br/><label>LCCN: </label>gs 52000047 //r85 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Alaska--Sitka district.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>[Blue Lake Dam (Proposed)]
<br/><br/><label>LC Class. No.: </label>QE75  / .C5 no. 147