Herold, Paul George,  1909- <br/><br/>
Study of Missouri shales for lightweight aggregate, 
by P. G. Herold [and others] 
 - Rolla,  1958. 
 - 39 p.  illus., map.  23 cm. 
<br/><br/>Bibliography: p. 39. 
<br/><br/><label>LCCN: </label>gs 58000186  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shale--Missouri.
<br/><br/><label>LC Class. No.: </label>QE131  / .A25 no. 23 
<br/><br/><label>Dewey Class. No.: </label>552.52