Countries of the World
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List of countries by population (United Nations) - Wikipedia
List of countries of the world in alphabetical order
Countries of the World | Infoplease
World Countries List, a-z list of Countries and Regions in the World :: Nations Online Project
How many countries are there in the world? - Total & List | Worldometers
List of Countries of the world in alphabetical order (A to Z) - Worldometers