Columbia subject headings:
Radioisotopes in geology.
Radioisotopes in hydrology.
Radioisotopes in oceanography.
Uranium--Decay--Environmental aspects.
Uranium--Isotopes--Environmental aspects.
Harvard subject headings:
Uranium--Decay--Environmental aspects.
Princeton subject headings:
Radioisotopes in geology.
Radioisotopes in hydrology.
Radioisotopes in oceanography.
Uranium--Decay--Environmental aspects.
Uranium--Isotopes--Environmental aspects.