Hatmaker, Paul Castleton,  1900- <br/><br/>
The fluorspar industry of the United States with special reference to Illinois-Kentucky district, 
by Paul Hatmaker ... and Hubert W. Davis ... 
 - Urbana, Ill.,  Printed by authority of the state of Illinois,  1938. 
 - 128 p. incl. illus., tables, diagrs.  26 cm. 
 - Illinois. State geological survey. Bulletin  no. 59 .
<br/><br/> In cooperation with the United States Department of the interior.  Bureau of mines.  At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey.  "Errata" slip inserted. 
<br/><br/>Bibliography: p. 114-121. 
<br/><br/><label>LCCN: </label>gs 38000136  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fluorspar.<br/>Mineral industries--Illinois.<br/>Mineral industries--Kentucky.
<br/><br/><label>LC Class. No.: </label>QE105  / .A16 no. 59