Jurksaitiene, Nijole, Laima Markeviciene, and Donatas Misiunas. “The Research on Environment Protection Knowledge and Competencies in Non-Formal Education”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 6, 2015): 235–239. Accessed December 4, 2024. https://journals23.rta.lv/index.php/ETR/article/view/808.