Statistics for occurrence #1 of “Mississippi River” in entry sioux-indians-or-dakota-indians of Harper's Encyclopedia of United States History:

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A large and powerful tribe of Indians, who were found by the French, in 1640, near the headwaters of the Mississippi River . The Algonquians called them , whence they came to be called Sioux. They occupied the vast domain extending from the Arkansas River, in the south, to the western tributary of Lake Winnipeg, in th...
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