Hall, Christopher Webbet. <br/><br/>
The gneisses, Gabbro-schists, and associated rocks of southwetern Minnesota 

 - Washington :  Geological Survey,  1899 
 - 160 p.  : ilus. 
 - Bulletin  ; 157 .
 - Bulletin  ; 157 .
<br/><br/><label>LCCN: </label>24497 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocas.
<br/><br/><label>Dewey Class. No.: </label>552  / H3