Erts, Ervīns, and Ināra Laizāne. “WATER QUALITY RESEARCH NEAR OŠUPES MANOR”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 20 (April 20, 2016): 273–278. Accessed December 22, 2024. https://journals.ru.lv/index.php/HET/article/view/3527.