Gudro I, Kalniņš J. The Arnal Family of «Polytechnicians» and Entrepreneurs and Their Contribution to the Economy of Latvia. HESIHE [Internet]. 2025 Dec. 19 [cited 2026 Mar. 6];9:80-111. Available from: https://hesihe-journals.rtu.lv/hesihe/article/view/HESIHE.2025.006