Vindele, Līga, and Veronika Buģina. “ECONOMIC ANALYSIS OF THE NATURAL RESOURCES IN THE DISTRICTS OF VIDZEME REGION”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 23, 2007): 244–253. Accessed November 24, 2024. https://journals23.rta.lv/index.php/ETR/article/view/1744.