99. Records of Project Blue Book 1947-69 (National Archives Microfilm Publication T1206, [94 rolls of 35 mm film]); Records of Headquarters United States Air Force (Air Staff), Record Group 341; National Archives II, College Park, MD. NARA Guide to Federal Records online at: http://www.archives.gov/research/guide-fed-records/groups/341.html#341.15. See also: The Project Blue Book Archive: The Project Blue Book Archive provides free access to tens of thousands of official documents related to the U.S. government's investigation of the UFO phenomenon.