Zariņš, Ansis, Augusts Rubans, and Gunārs Silabriedis. “Digital Zenith Camera of the University of Latvia”. Geodesy and Cartography 42, no. 4 (December 20, 2016): 129-135. Accessed December 2, 2024. https://ijspm.vgtu.lt/index.php/GAC/article/view/2421.