"\"The richest hole on earth\" : a history of the Bingham Copper Mine" . "History of the Bingham Copper Mine"@en . . . . . . . . . . . . "The richest hole on earth a history of the Bingham Copper Mine"@en . . "The richest hole on earth; a history of the Bingham Copper Mine" . . . "The richest hole on earth : a history of the Bingham Copper Mine"@en . "The richest hole on earth : a history of the Bingham Copper Mine" . . . . .