“The Problem of Understanding the Manifestations of Ravenstein’s Laws on Migration Processes of Pre-Soviet Russia and Soviet Periods of Russian Science”, Mediterr. J. Soc. Sci., vol. 6, no. 3, p. 718, May 2015, Accessed: Aug. 17, 2024. [Online]. Available: https://www.richtmann.org/journal/index.php/mjss/article/view/6610