VINDELE, Līga; BUĢINA, Veronika. ECONOMIC ANALYSIS OF THE NATURAL RESOURCES IN THE DISTRICTS OF VIDZEME REGION. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 244–253, 2007. DOI: 10.17770/etr2007vol1.1744. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/1744.. Acesso em: 21 may. 2024.