otter lake - map search
Topographic map d11 of scale 1:1 000 000
English - US military - 1989 - 13Mb -
Topographic map 068743 of scale 1:250 000
English - US Geological Survey - 1961 - 9Mb -
Topographic map 075047 of scale 1:250 000
English - US Geological Survey - 1952 - 6Mb -
Topographic map f17 of scale 1:1 000 000
English - US military - 1990 - 15Mb -