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| | Guyana Regions |
 | | The following are rivers of Guyana: Barima, Berbice, Courantyne, Cuyuni, Demerara, Essequibo, Mahaica, Mazaruni, Pomeroon, Potaro, Rupununi, Siparuni, Takutu, and Waini. |
 | | In the colonial period, by an ordinance of 1838, British Guiana was divided into the three counties of Berbice (40,077 km.²), Demerara (12,432 km.²), and Essequibo (156,749 km.²). |
 | | Essequibo Islands-West Demerara includes islands in the mouth of the Essequibo River, such as Leguan and Wakenaam Islands. |
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