Evolution of the Conservation Movement, 1850-1920
U.S. Statutes at Large, Vol. 33, Part 1, Chap. 1620, pp. 319-24. "An Act To modify and amend an agreement with the Indians of the Devils Lake Reservation, in North Dakota, to accept and ratify the same as amended, and making appropriation and provision to carry the same into effect." H.R. 11128; Public Act No. 179
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