Geology of the Elliston region, Powell and Lewis and clark Counties, Montana : a description of rocks and structures in the region of the imbricate front of Sapphire thrust plate, from a reconnaissance study / 
by R.G. Schmidt ... [et.al.]. 
 - Washington :  United States Government Printing Office,  1994 
 - 25 p. :  ill. ;  28 cm. 
 - U.S. geological survey bulletin ;  2045 .