English
Roll 1 (microfilm) Case Files of Individual Sightings, Index, and File Nos. 1-54 , summer 1947-July 9, 1947, Project Blue Book . Released by U.S.National Archives and Records Administration (NARA), 1976. RG (Record Group) 341.
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Project Blue Book · UFOs · U.S. Air Force · U.S. National Archives and Records Administration