- Agricultural Statistics, USDA National Agriculture Statistics Service. An annual publication that covers agricultural production, supplies, consumption, facilities, costs and returns. Data for 1994 - date.
- American FactFinder, Population, housing, economic and geographic data
- County and City Data Book 2000, US Census Bureau. Social and economic statistics at state and metropolitan level.
- Guide to state statistical abstracts, US Census Bureau - Links to state resources
- Handbook of International Economics Statistics, 1998, CIA.
- State and Country Quick Facts
- State Rankings, US Census Bureau. Tables for the Statistical Abstract of the United States, 2000 edition.
- Statistical Abstract of the United States, 1995 - 2001.
- World Development Indicators 2001, Selected Content. World Bank
- World Factbook 2002, CIA
- 2004 World Population Data Sheet, Population Reference Bureau
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