RUPPEL, Edward T.
Geology of the basin quadrangle Jefferson, Lewis and Clark, and Powell counties, Montana / by Edward T. Ruppel. -- Washington : United States Government Printing Office, 1963 - 121 p. + map. -- (Geological Survey Bulletin ; 1151).
Geología
Montana
55(786)
Geology of the basin quadrangle Jefferson, Lewis and Clark, and Powell counties, Montana / by Edward T. Ruppel. -- Washington : United States Government Printing Office, 1963 - 121 p. + map. -- (Geological Survey Bulletin ; 1151).
Geología
Montana
55(786)