"Bergbau." . . "Bergwerk." . . "Geschichte." . . "Colorado (Staat)" . . "Geisterstadt." . . . . "USA." . . "Colorado" . . . . . . . . "Local history" . "Local history"@en . . . . . . "Guidebooks" . "Guidebooks"@en . . . . . . . . . . . . . "Guide to the Colorado ghost towns and mining camps"@en . "Guide to the Colorado ghost towns and mining camps" . . . . . . "History" . . "History"@en . . . "Colorado ghost towns and mining camps"@en . . . . "Guide to the Colorado Ghost Towns and Mining Camps. [With illustrations.]"@en . "Guide to the Colorado Ghost Towns and Mining Camps. [With illustrations.]" . . "Reiseführer" . . . . . .