Determination of Naturally Occurring Radioactive Materials-norm (Ra-226, Ra-228) in synthetic flowback developed at laboratory scale from rocks of the la LUNA-1 well, colombia, and benchmarking with Marcellus and eagle ford shale plays. JETIA [Internet]. 2021 Aug. 31 [cited 2026 Oct. 23];7(30):45-61. Available from: https://itegam-jetia.org/journal/index.php/jetia/article/view/770