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plate 1. Landslide inventory map of the southwest quarter of the Pittsburg quadrangle, Columbia County, Oregon -- plate 2. Landslide inventory map of the southeast quarter of the Pittsburg quadrangle, Columbia...
plate 1. Landslide inventory map of the northwest quarter of the Dixie Mountain quadrangle, Washington and Columbia counties, Oregon -- plate 2. Landslide inventory map of the northeast quarter of the Dixie...
plate 1. Landslide inventory map of the northwest quarter of the Vernonia quadrangle, Columbia County, Oregon -- plate 2. Landslide inventory map of the northeast quarter of the Vernonia quadrangle, Columbia...
plate 1. Landslide inventory map of the northwest quarter of the Sauvie Island quadrangle, Columbia and Multnomah counties, Oregon -- plate 2. Landslide inventory map of the northeast quarter of the Sauvie...