The World Factbook. 2008.
EuropeMiddle EastNorth AmericaOceaniaPhysical WorldPolitical WorldSouth AmericaSoutheast AsiaTime ZonesUnited States
Africa | Antarctic | Arctic | Asia | Central America | |
Europe | Middle East | North America | Oceania | Physical World | |
Political World | South America | Southeast Asia | Time Zones | United States | |