Abundance of N15 in the nitrogen present in crude oil and coal.
D003031:Coal; D006801:Humans; D009584:Nitrogen; D009590:Nitrogen Radioisotopes; D009821:Oils; D010578:Petroleum; D011851:Radioactivity
D003031:Coal; D009590:Nitrogen Radioisotopes; D009821:Oils; D010578:Petroleum; D009584:Nitrogen
COAL; NITROGEN, RADIOACTIVE; OIL