U.S. Geological Survey - Shevlin Park, Oregon, N4400-W12122. 5/7. 5

Washington, DC: U.S. Geological Survey, 1962. Color topographic map. 7.5 Minute Series. 27" x 22". With fold creases from having been used for geothermal research. Provenance: GeothermEx, a Schlumberger Company. Some maps are also annotated. .

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