United States. Bureau of the Census. Population Division & United States. Bureau of the Census. (1980). A compilation of age-specific fertility rates for developing countries. U.S. Dept. of Commerce, Bureau of Census : for sale by the Supt. of Docs., U.S. Govt. Print. Off..
Lua i Stíl Chicago (17ú heag.)United States. Bureau of the Census. Population Division agus United States. Bureau of the Census. A Compilation of Age-specific Fertility Rates for Developing Countries. Washington: U.S. Dept. of Commerce, Bureau of Census : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1980.
Lua MLA (8ú heag.)United States. Bureau of the Census. Population Division agus United States. Bureau of the Census. A Compilation of Age-specific Fertility Rates for Developing Countries. U.S. Dept. of Commerce, Bureau of Census : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1980.