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| | Ozark Mountains -- Encyclopædia Britannica |
 | | The mountains occupy an area of about 50,000 square miles (130,000 square km), of which 33,000 square miles (85,500 square km) are in Missouri, 13,000 square miles (33,700 square km) in northern Arkansas, and the remainder in southern Illinois and southeastern Kansas. |
 | | The mountains occupy an area of about 50,000 square miles (130,000 square km), of which 33,000 square miles (85,500 square km) are in Missouri, 13,000 square miles (33,700 square km) in northern Arkansas, and the remainder in southern... |
 | | The Ouachita Mountains extend approximately 225 miles (360 km) east to west from Little Rock, Ark., to Atoka, Okla., and north to south, approximately 5060 miles (8095 km) from the Arkansas River Valley to the northern margin of the Coastal Plain. |
| www.britannica.com /eb/article-9057868?tocId=9057868 (920 words) |
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