East Troy - map search

Topographic map 053638 of scale 1:63 000

English - US Geological Survey - 1897 - 5Mb -

Topographic map 062182 of scale 1:63 000

English - US Geological Survey - 1948 - 9Mb -

Topographic map 013491 of scale 1:24 000

English - US Geological Survey - 1957 - 6Mb -