altoona - map search
Topographic map 068793 of scale 1:250 000
English - US Geological Survey - 1956 - 10Mb -
Topographic map 068950 of scale 1:250 000
English - US Geological Survey - 1955 - 10Mb -
Topographic map 068746 of scale 1:250 000
English - US Geological Survey - 1957 - 13Mb -
Topographic map nl10 of scale 1:1 000 000
English - US military - 1957 - 6Mb -