Johnson, Ross B. 1919-
Geology of the Huerfano park area Huerfano and custer counties Colorado / by Ross B. Johnson. -- Washington : United States Government Printing Office, 1959 - P. 87-119 + map. -- (Geological Survey Bulletin ; 1071-D).
Colorado
Petrología
Rocas
552(788)
Geology of the Huerfano park area Huerfano and custer counties Colorado / by Ross B. Johnson. -- Washington : United States Government Printing Office, 1959 - P. 87-119 + map. -- (Geological Survey Bulletin ; 1071-D).
Colorado
Petrología
Rocas
552(788)