Cox, Guy Henry. <br/><br/>
Lead and zinc deposits of northwestern Illinois, 

 - Urbana,  State geological survey, University of Illinois,  1914. 
 - 120 p.  plates, 4 fold. maps (in pocket) diagrs.  24 cm. 
<br/><br/><label>LCCN: </label>gs 15000007  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lead mines and mining--Illinois.<br/>Zinc mines and mining--Illinois.
<br/><br/><label>LC Class. No.: </label>TN453.I3  / C6