Lomanovska, Inita, and Ērika Teirumnieka. 2018. “ASSESSMENT OF THE ENVIRONMENTAL ELEMENTS PERFOMANCE EFFECTIVENESS IN LAND DRAINAGE SYSTEMS”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 22 (April): 123-26. https://doi.org/10.17770/het2018.22.3625.