1. Newberry Volcano's youngest lava flows Author/Creator: Robinson, Joel E., cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1997 Format: Map Access & Availability: Loading
2. Under trees and water at Crater Lake National Park, Oregon Author/Creator: Robinson, Joel E., cartographer Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 2012 Format: Map Access & Availability: Loading