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As-Built Drawings For Roadwork, compiled 1937 - 1991 ARC Identifier 607358 Architectural and Engineering Drawings from the Department of the Interior. National Park Service. Denver Service Center. Technical Information Center. (11/15/1971 - ) NARA's Rocky Mountain Region (Denver), Denver, CO Series from Record Group 79: Records of the National Park Service, 1785 - 2006 |