Statistics for occurrence #1 of “Indian Territory” in entry indians-american of Harper's Encyclopedia of United States History:

...ely under the control of the national government. There were 133,382 Indians on reservations, or at schools under control of the Indian Office; 52,065 were included in the five civilized tribes of Indian Territory ; there were 8,278 Pueblos in New Mexico and Arizona, and 8,189 Indians east of the Mississippi. Besides these, there were 32,567 taxable and self-sustaining Indians who had become citizens of the U...
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