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PHELPS DODGE CORP. SMELTER NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Keyes Cornelius Cornelius Michael Photographer File PHELPSDODGECORP SMELTERNARA tif tif File PHELPSDODGECORP SMELTERNARA NARAcooperation PDUSGov Douglas Arizona Copper smelters chimneys NARA