Population Reference Bureau at http://www.prb.orgU.S. Census Bureau at http://ww

Population Reference Bureau at http://www.prb.orgU.S. Census Bureau at http://www.census.govWorld Population Information at http://www.census.gov/ipc/www/world.htmlPopulation Connection at http://www.populationconnection.orgThe World Factbook at http://www.cia.gov/cia/publications/factbook/index.htmlBureau of Labor Statistics at http://www.bls.govEnvirolink at http://www.envirolink.orgWomenWatch at http://www.un.org/womenwatch/Institute for Research on Poverty at http://www.irp.wisc.eduThe World Bank at http://www.worldbank.org/dataNational Center for Children in Poverty at http://www.nccp.orgJoint Center for Poverty Research at http://www.jcpr.org