https://www.usgs.gov/publications/distribution-and-isotopic-composition-uranium-lower-nueces-river-nueces-bay-and-corpus
The uranium concentration and isotopic composition of water and suspended sediment from the Nueces River, Nueces Bay and Corpus Christi Bay were determined by...
isotopic compositionnueces riverdistributionuraniumlower
https://www.usgs.gov/media/files/rsil-report-stable-isotopic-composition-reference-materials-usgs61-usgs62-and-usgs63
Reston Stable Isotope Laboratory: Report of Stable Isotopic Composition for reference materials USGS61, USGS62, and USGS62 (hydrogen, carbon, and nitrogen...
isotopic compositionreference materialsreportstable