フラットヘッド居留地（モンタナ州西部）登録関係インディアン局記録　米国国立公文書館所蔵
Selected Records of the Bureau of Indian Affairs Relating to the Enrollment of Indians on the Flathead Reservation, 1903 - 1908. NARA RG75: Records of the Bureau of Indian Affairs. 35mm silver positive microfilm 3 reels.