Afonyushkina Anna V. RussiaVoronezhVoronezh State University, 1 University Sq., Voronezh 394018, RussiaAssociate Professor at the Department of History of Foreign Countries and Oriental StudiesPh.D. in History afonyushkina.a@yandex.ru Author's articles On the Problem of Development of Source Base on History in Russia in the Middle of the 19th Century