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Keywords:
37 Earth Sciences
,31 Biological Sciences
,34 Chemical Sciences
,Archaeology
,Carbon Isotopes
,Carbonates
,Humic Substances
,Nitrogen Isotopes
,Plants
,Soil
,Spectroscopy, Fourier Transform Infrared
37 Earth Sciences
,31 Biological Sciences
,34 Chemical Sciences
,Archaeology
,Carbon Isotopes
,Carbonates
,Humic Substances
,Nitrogen Isotopes
,Plants
,Soil
,Spectroscopy, Fourier Transform Infrared