Bule, Kristīne, and Ivars Matisovs. “SURFACE WATER IMPACT ON A LARGE LUDZAS LAKE”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 20 (April 20, 2016): 231–237. Accessed November 30, 2024. https://journals.rta.lv/index.php/HET/article/view/3533.