Robuta

https://www.usgs.gov/publications/preliminary-assessment-stable-nitrogen-and-oxygen-isotopic-composition-usgs51-and Preliminary assessment of stable nitrogen and oxygen isotopic composition of USGS51 and USGS52... RationaleDespite a long history and growing interest in isotopic analyses of N2O, there is a lack of isotopically characterized N2O isotopic reference... preliminary assessmentstablenitrogen