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Continue to ChatRamsey Island (historical) Map - Multnomah County, OR https://www.yellowmaps.com/usgs/topo.cfm?map=or-1132104-ramsey-island-%28historical%29
Ramsey Island (historical) Map - Multnomah County, OR https://www.yellowmaps.com/usgs/topo.cfm?map=or-1132104-ramsey-island-%28historical%29