big beaver - map search
Topographic map nk17 of scale 1:1 000 000
English - US military - 1957 - 5Mb -
Topographic map 002938 of scale 1:24 000
English - US Geological Survey - 1957 - 10Mb -
Topographic map f18-c of scale 1:500 000
English - US military - 1991 - 12Mb -
Topographic map m13-3 of scale 1:500 000
Russian - Soviet military - 2Mb -