Gliožaitis, Algirdas. “Administrative Division of Lithuania on the Russian Maps of the XIX and XX Centuries (1 of 3)”. Geodesy and Cartography 32, no. 2 (August 3, 2012): IIa-IIf. Accessed April 24, 2024. https://journals.vilniustech.lt/index.php/GAC/article/view/12133.