Krupnova, Tatyana, Olga Rakova, Valerii Udachin, Svetlana Gavrilkina, and Kirill Bondarenko. 2023. “ISOTOPIC RATIOS AS A TOOL FOR STUDYING SOURCES OF COPPER, LEAD, AND ZINC IN NATURAL AND URBAN ENVIRONMENTS: A REVIEW”. GEOMATE Journal 25 (107):33-41. https://geomatejournal.com/geomate/article/view/3658.