1. Groundwater Resources of Atascosa and Frio Counties, Texas;Alexander;Texas Water Development Board, Austin, Texas, Rept,1966
2. Isotopic shifts in natural uranium compounds;Barnov;Geochemistry,1958
3. Uranium 234 and uranium 238 in the waters and bottom sediments of Lake Balkash and the age of the lake;Chalov;Geochem. Int.,1970
4. The U234U238 ratio in natural waters and its use in nuclear geochronology;Chalov;Geochem. Int.,1965
5. Transactions of the Third Session of the Committee for the Determination of Absolute Ages of Geological Formations;Cherdyntsev,1955