Bariatska, N. and Sergeieva, S. 2025. CONTROL SAMPLES USING FOR QUALITY ASSURANCE AND CONTROL (QA/QC). Visnyk of Taras Shevchenko National University of Kyiv. Geology. 2, 101 (Jan. 2025), 75–80. DOI:https://doi.org/10.17721/1728-2713.101.11.