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Polis | Definition & Facts | Britannica
Police Department - Coraopolis Borough
Polis - World History Encyclopedia
The Greek polis (article) | Classical Greece | Khan Academy
Polis Definition & Meaning - Merriam-Webster
Polis - Ancient Greek City-States - ThoughtCo
Polis - Wikipedia
Police vs. Polis — What’s the Difference?
Input Crowd, Output Meaning - Pol
List of modern words formed from Greek polis - Wikipedia