TY - RPRT TI - Quality assurance and quality control in light stable isotope laboratories: A case study of Rio Grande, Texas, water samples AU - T.B. Coplen AU - H. Qi PY - 2009 DO - 10.1080/10256010902871952 UR - https://pubs.usgs.gov/publication/70035133 ID - 70035133 ER -