Марица - map search
Topographic map n36-35 of scale 1:200 000
Russian - Soviet military - 1982 - 2Mb -
Topographic map nm36-03 of scale 1:250 000
English - US military - 1956 - 6Mb -
Topographic map n36 of scale 1:1 000 000
Russian - Soviet military - 1939 - 5Mb -