Dân số học la gì

#1







https://www.nguoi-viet.com/little-saigon/cong-dong/thong-ke-dan-so-uoc-tinh-dan-so-tu-phan-tich-nhan-khau-hoc/


http://phongytedongtrieu.com.vn/ansinh/thong-tin-y-hoc/dan-so-vang-la-gi-mot-so-ten-goi-khac-.html


















https://2020census.gov/vi.html