@book{ international1973iaea, title={Environmental Isotope Data No. 4: World Survey of Isotope Concentration in Precipitation (1968鈥?969)}, series={Technical Reports Series}, number={147}, year={1973}, isbn={92-0-145173-3}, url={http://www.dgdingfa.net/publications/1248/environmental-isotope-data-no-4-world-survey-of-isotope-concentration-in-precipitation-1968-1969}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }
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