File:Colorado - our wonderful mineral productions - hauling machinery in the mountains, near the timber line, at Leadville, 10,500 feet above the level of the sea (cropped).jpg
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Colorado_-_our_wonderful_mineral_productions_-_hauling_machinery_in_the_mountains,_near_the_timber_line,_at_Leadville,_10,500_feet_above_the_level_of_the_sea_(cropped).jpg (353 × 580 pixels, file size: 56 KB, MIME type: image/jpeg)