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Sioux - Wikipedia
Sioux Native Americans: Their History, Culture, and Traditions
Sioux | Tribes, Meaning, Languages, Religion, & Facts
Sioux - World History Encyclopedia
Lakota, Dakota, Nakota – The Great Sioux Nation - Legends of America
Sioux | Encyclopedia.com
Sioux: At a Glance | Britannica
Sioux summary | Britannica
Sioux language - Wikipedia
Encyclopedia of the Great Plains | SIOUX - UNL