Дорофеев, Александр Александрович, and Елена Револьдовна Хохлова. 2019. “History, Principles and Methods of Landscape Mapmaking of Tver Region”. HERALD OF TVER STATE UNIVERSITY. SERIES: GEOGRAPHY AND GEOECOLOGY, no. 4 (February):21-35. https://journal.tversu.ru/index.php/geo/article/view/96.