Bownocker, J. A.  1865-1928. <br/><br/>
The coal fields of the United States. 
General introduction, by Marius R. Campbell; Ohio, by J. A. Bownocker. 
 - Washington,  U.S. Govt. print. off.,  1929. 
 - iv, 101 p. incl. tables, diagrs.  IX pl. (incl. 7 fold. maps, (2 in pocket) fold. tab.  29 cm. 
 - U.S. Geological survey. Professional paper  100 .
<br/><br/> At head of title: Department of the interior.  Issued also as House doc. no. 1806, 64th Cong., 2d sess. 
<br/><br/><label>LCCN: </label>gs 30000220  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Ohio.<br/>Coal--United States.
<br/><br/><label>LC Class. No.: </label>QE75  / .P9 no. 100 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.16:100