Federal Resources
- Census Bureau
- Department of Defense, National Geospatial-Intelligence Agency
- Department of State: Background Notes
- Federal Emergency Management Agency, Map Service Center
- Geological Survey
- Geological Survey: National Map
- Library of Congress: Country Studies
- Library of Congress: Science and Technology
- National Institute of Standards and Technology (NIST)
- National Science Foundation (NSF)
- Office of Scientific and Technical Information (OSTI)
- Science.gov
- US Drought Portal
- US Geological Survey, Historical Topographic Maps
International Resources
- European Union Homepage, Europa
- Library of Congress, Country Studies
- UNESCO: United Nations Educational, Scientific and Cultural Organization
- United Nations, Food and Agriculture Organization
- United Nations Homepage
- US Central Intelligence Agency, World Fact Book
- US State Department Bilateral Relations Fact Sheet (Background Notes)
