©
Nielsen Library: Petroglyphs 1979
©
Nielsen Library: Petroglyphs 1979
©
Nielsen Library: Petroglyphs 1979
©
Nielsen Library: Petroglyphs 1979
©
Nielsen Library: S Site I (Mc Kern) 1979
©
Nielsen Library: Petroglyph Man on Horse 1979
©
Nielsen Library: Petrolyph 1979