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~ Portland OR topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1905, updated 1948
~ Portland OR topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1940
~ Portland OR topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1905, updated 1921
~ Portland OR topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1897, updated 1901