Howell, J. V.  1891- <br/><br/>
Twin lakes district of Colorado, 
by J. V. Howell. 
 - Denver, Col.,  Eames bros., state printers,  1919. 
 - 108 p.  illus., fold. map in pocket, diagrs.  23 cm. 
<br/><br/>The author's dissertation, University of Iowa, 1922, but not published as a thesis. 
<br/><br/>Bibliography: p. 16-17. 
<br/><br/><label>LCCN: </label>gs 21000131  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Colorado.
<br/><br/><label>LC Class. No.: </label>QE91  / .A4 no. 17