Znotina, Madara, Ivars Liepins, and Ksenija Kosenko. “Development of Latvian National 2nd Order Leveling Network”. Geodesy and Cartography 42, no. 4 (December 20, 2016): 136-139. Accessed November 26, 2024. https://bme.vgtu.lt/index.php/GAC/article/view/2411.