It 46. h?. Dr, H. F. Plank, LASL. Ltr., Dr. Plank, to Dr. W. D. Urry, Asst. for Atomic Energy, pcS/0, USAF, 9 Jan. 1952, subj.: Cloud Sampling Aircraft, see App. 48. Ltr., Col, Hooks, to DCS/D, USAF, n, d., subj,: Aircraft for Sampling, in J-ll files, Dr. Plank, LASL. 9. Ltr., Dr. Graves to Col. K. E, Melds, Dir of Mil, Applications, AEC, 19 Jan, 1952, subj.: Aircraft for Sampling, see App. 50. Ltr., Col, ‘Fields to Brig. Gen, Bunker, 19 Feb. 1952, subj.: Manned Aircraft, see App. Ltr., Col, Hooks to Dr. Graves, 28 Jan.1952, subj.: Fighter Aircraft for Cloud Sampling, see App. 526 "History of the Air Force Special Weapons Center Participation in Operation TUMBLER/SNAPPER," 58, 101, 139, 145; "Participation of the 925th Test Group (Atomic) in Operation TUMBLER/SNAPPER, 1 March 1952-31 March 1952," 536 "History of the Air Force Special Weapons Center Participation in Operation TUMELER/SNAPPER," 81.85, Rpt., "Test Air Operations Rerort for TUMBLER/SNAPPER," prep. by Test Acft. Unit, n. d., in Hist. Div. files. History of the Air Force Special Weapons Center Participation in Operation TUM BLER/SNAPPER,* 103, 140. "Participation of 925th Test Group (Atomic) in Operation TUMBLER/SNAPPER, 1 March 1952- 31 March 1952," in Hist. Div. files; “Test Air Operations Report for TUMBLER/SNAPPER." 57. "History of Air Force Special Weapons Center Participation in Operation TUMBLER/SNAPPER," 66, 58. "Test Air Operations Report for TUMBLER/SNAPPER, */TUMBLER/ABLE X Ray (Dry Run)/, 596 Ibid.3 “History of Air Force Special Weapons Center Participation 60. "Test Air Operations Report for TUMBLER/SNAPPER," (TUMBLER/BAKER). inOperation TUMBLER/SNAPPER,* 1,347 61 AFWL/HO SWEH ~2-003h,