The plot of δD vs δ18O values (a) and d-excess vs δ18O values (b

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Tracing isotopic signatures (δD and δ18O) in precipitation and

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The δD vs. δ 18 O plot of natural groundwater, lake water and

The plot of δD vs δ18O values (a) and d-excess vs δ18O values (b) of

Plots of d-excess vs. δ 18 O, showing the relationship between d

Global meteoric water line - Wikipedia

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Table 2 from Water vapor δ(2) H, δ(18) O and δ(17) O measurements