. . . . . . . . . . . . "Isotope techniques in the hydrologic cycle ; papers" . . "Isotope techniques in the hydrologic cycle ; papers"@en . . "Isotope techniques in the hydrologic cycle papers" . "Isotope techniques in the hydrologic cycle papers"@en . . . . . . . . . . . . "Conference papers and proceedings"@en . "Electronic books" . "Conference papers and proceedings" . "Isotope techniques in the hydrologic cycle; papers" . . . . "Isotope techniques in the hydrologic cycle : papers"@en . . "Symposium on Isotopes in the Hydrologic Cycle, Urbana, Ill., 1965." . . . "Isotopes radioactifs en hydrologie Congrès." . . "Symposium on Isotope Ratios as a Pollutant Source and Behaviour Indicators (1974 : Vienna, Austria)" . . . "Hidrogeologia." . . "Symposium on Isotopes in the Hydrologic Cycle (1965 : University of Illinois)" . . . "Symposium on Isotopes in the Hydrologic Cycle (1965 : Urbana, Ill.)" . . .