west twin lake - map search
Topographic map 069058 of scale 1:250 000
English - US Geological Survey - 1954 - 11Mb -
Topographic map 069058 of scale 1:250 000
English - US Geological Survey - 1989 - 11Mb -
Topographic map 069058 of scale 1:250 000
English - US Geological Survey - 1958 - 13Mb -