Sisseton Indian Agency (North Dakota)
Letters received by the Office of Indian Affairs from the Sisseton Agency, 1867-1880, have been microfilmed by the National Archives as part of their Microcopy Number M234. Copies are available at the National Archives and at the Family History Library and its family history centers on their microfilm roll numbers 1661554 thru 1661561.
- American Indians: A Select Catalog of National Archives Microfilm Publications. Washington DC: National Archives Trust Fund Board, National Archives and Records Administration, 1998.
- Hill, Edward E. (comp.). Guide to Records in the National Archives of the United States Relating to American Indians. Washington DC: National Archives and Records Service, General Services Administration, 1981.
- Hill, Edward E. The Office of Indian Affairs, 1824-1880: Historical Sketches. New York, New York: Clearwater Publishing Company, Inc., 1974.
- Historical Sketches for Jurisdictional and Subject Headings Used for the Letters Received by the Office of Indian Affairs, 1824-1880. National Archives Microcopy T1105.
- Preliminary Inventory No. 163: Records of the Bureau of Indian Affairs. Washington DC: National Archives and Records Services.