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nitrate(2)
nitrogen(2)
nitrogen isotopes(2)
clumped isotopes(1)
fractionation(1)
ice core(1)
island mass effect(1)
isotopes(1)
isotopomer(1)
leg 119, site 745(1)
marine aerosol(1)
marine rainwater(1)
mars(1)
mars meteorites(1)
nitrogen cycle(1)
nitrogen fixation(1)
nitrogen isotope(1)
nitrous oxide(1)
nox(1)
ocean drilling program(1)
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