Medveckis, Arturs. “IDENTITY OF KĀRLIS RŪDOLFS KREICBERGS IN HIS LIFE”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 4 (May 26, 2016): 512–524. Accessed May 3, 2024. https://journals.ru.lv/index.php/SIE/article/view/1585.