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://189185.vm7pq.group/bulletin-science/article/view/221. Acesso em: 29 ноя. 2024.