Rothrock, E. P.  1889-1977. <br/><br/>
A quarter century of mineral production, 
by E. P. Rothrock. 
 - Vermillion, South Dakota,  University of South Dakota,  1932. 
 - 55 l.  illus. 
 - South Dakota Geological Survey. Report of investigations,  no. 13 .
 - Report of investigations (South Dakota Geological Survey) ;  no. 13. .
<br/><br/> At head of title: South Dakota State Geological Survey, E. P. Rothrock, State Geologist.  Reproduced from type-written copy. 
<br/><br/><label>LCCN: </label>gs 33000056  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--South Dakota.
<br/><br/><label>LC Class. No.: </label>TN24.S8  / R62