Series P-20 Population characteristics United States Bureau of the Census. text Washington, D.C U.S. Dept. of Commerce, Bureau of the Census For sale by the Supt. of Docs, U.S. G.P.O monographic Description based on: No. 352 Population Socioeconomic Factors C 56.218:P-20 C 56.218:P-20 http://www.census.gov/prod/www/abs/popula.html#pop http://www.census.gov/prod/www/abs/popula.html#pop 20160527183637.0 299633