| 20. |  | Columbia River Highway: A State Road That Is a Model of Artistic Engineering | Scenic overlooks; Rivers; Passes (Landforms); Mountains; Tourism; Automobile travel; Bridges; Tunnels; Roads; Civil Engineering; | 4 p. Article describing the building of the Columbia River Highway, including construction details. The article also contains six photographs: one full-page photograph depicting a picturesque curve around... |
