Perry, Eugene S.  1892- <br/><br/>
Montana in the geologic past. 

 - Butte,  Montana School of Mines,  1962. 
 - vi, 78 p.  illus., port., maps (1 fold.) diagrs., tables.  28 cm. 
 - Montana. Bureau of Mines and Geology. Bulletin 26 .
 - Montana Bureau of Mines and Geology.  Bulletin ;  26. .
<br/><br/>Bibliography: p. 77-78. 
<br/><br/><label>LCCN: </label>gs 62000273  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Montana.
<br/><br/><label>LC Class. No.: </label>QE133  / .P46