The Problem of Understanding the Manifestations of Ravenstein’s Laws on Migration Processes of Pre-Soviet Russia and Soviet Periods of Russian Science. Mediterranean Journal of Social Sciences, [S. l.], v. 6, n. 3, p. 718, 2015. Disponível em: https://www.richtmann.org/journal/index.php/mjss/article/view/6610.. Acesso em: 22 dec. 2024.