Pearson, Robert C. <br/><br/>
Mineral resources of the Fallin Creek Wilderness Study Area, Beaverhead County, Montana / 
by Robert C. Pearson...(et.al) 
 - Washington D. C :  US Government Printing Office,  1987. 
 - 13 p. :  ill ;  27 cm 
 - U. S. Geological Survey Bulletin ;  1724 .
<br/><br/> PTSL : including map