There is no one repository that supplies all the records in these microfilm reels.  It is worth searching online as some documents specific to tribes or topics can be found. 

Bureau of Indian Affairs Records, 1807-1901

About

From National Archives Record Group 75, these records consist of incoming and outgoing correspondence and special files on specific topics.

Alternate title

Office of Indian Affairs

Record Group 75

Location

Library Annex Cabinets E93 .U547 1963, Multimedia Microfilm 669, and Library Annex Cabinets E77 .U575.

Format

Microfilm

Arrangement

Materials are generally in chronological order. In three series:

• Letters sent by the Office of Indian Affairs, 1824-1882 (NARA Microfilm Publication M21). 122 reels of microfilm Library Annex Cabinets E93 .U547 1963.
  Letters sent include instructions to agents and military matters.
• Letters received by the Office of Indian Affairs, 1824-81 (NARA Microfilm Publication M 234). 962 reels of microfilm Library Annex LISA Microfilm Film 669. (Arkansas Superintendency is on reel 29).
  Letters received include reports and requisitions from agents, personal petitions, and disputes of all kinds.
• Special Files of the Office of Indian Affairs, 1807-1901 (NARA Mirofilm Publication M574). 85 reels of microfilm (we have only reels 24 and 63). Library Annex Cabinets E77 .U575.
  The Special Files consist of correspondence, reports, accounts affidavits, and other records that were brought together for easier reference. We have reel 24, which includes negotiations with Cherokee Chief John Ross, 1861-66, and reel 63, which includes records relating to the Quapaw Agency, 1874-78.

Items

1000+ reels of film

Publication

National Archives Record Group 75