Radioactive pollution of rivers in Czechoslovakia.
D003604:Czechoslovakia; D004583:Electrons; D005843:Geography; D006801:Humans; D008906:Mining; D010944:Plants / Q000032:analysis; D011194:Potassium Isotopes / Q000032:analysis; D011883:Radium / Q000032:analysis; D011886:Radon / Q000032:analysis; D012987:Soil / Q000032:analysis; D014501:Uranium; D014878:Water Pollution, Radioactive / Q000032:analysis*
D011194:Potassium Isotopes; D012987:Soil; D014501:Uranium; D011886:Radon; D011883:Radium