crystal lake - map search
Topographic map 053790 of scale 1:63 000
English - US Geological Survey - 1925 - 7Mb -
Topographic map h25-a of scale 1:500 000
English - US military - 1993 - 8Mb -
Topographic map f18-c of scale 1:500 000
English - US military - 1991 - 12Mb -