Grout, Frank F.  1880- <br/><br/>
Preliminary report on the clays and shales of Minnesota, 
by Frank F. Grout and E.K. Soper. 
 - Minneapolis,  The University of Minnesota,  1914. 
 - viii, 175 p.  illus., plates, fold. map, fold. tab., diagrs.  23 cm. 
 - Minnesota. Geological survey.  Bulletin 11 .
<br/><br/> At head of title: The University of Minnesota.  In cooperation with the United States geological survey. 
<br/><br/><label>LCCN: </label>gs 15000336  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clay--Minnesota.
<br/><br/><label>LC Class. No.: </label>TN942  / .G8