RYAZANTSEV SERGEY VASILIEVICH. MIGRANT WORKERS AS A RESOURCE FOR THE DEMOGRAPHIC DEVELOPMENT OF RUSSIA AND THE REPUBLIC OF KAZAKHSTAN. «Вестник НАН РК», [S. l.], n. 2, p. 204–212, 2021. Disponível em: http://91834.libg.asia/bulletin-science/article/view/221. Acesso em: 1 дек. 2024.