http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
measurement of urbanization and projection of urban population
edited by Sidney Goldstein and David F. Sly ; with contributions by Eduardo E. Arriaga, Kalman Tekse, Marc Termote
Population density; Urbanization; Rural-urban migration; Mật độ dân số; Đô thị hóa; Di cư