Rubey, William Walden,  1898-1974. <br/><br/>
Geology and mineral resources of the Hardin and Brussels quadrangles in Illinois. / 
Prepared in cooperation with the Illinois State Geological Survey Division. 
 - Washington :  U.S. Govt. Print. Off.,  1952. 
 - 179 p. :  ill., maps (2 col., fold. in pocket) diagrs. (part fold.) tables. ;  29 cm. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>LCCN: </label>gs 52000211  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Illinois--Hardin quadrangle<br/>Geology--Illinois--Brussels quadrangle<br/>Mines and mineral resources--Illinois--Hardin quadrangle<br/>Mines and mineral resources--Illinois--Brussels quadrangle
<br/><br/><label>LC Class. No.: </label>QE75  / .P9 no. 218 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.16:218