UK UFO Disclosure Part 28, 317p - UK-document-31-183-1
UK-document-31-185-1
UK-document-31-184-1
UK-document-31-188-1
MUFON UFO Journal - 1982 5. May
UK-document-24-2071-1
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UK UFO Disclosure Part 31, 314p - UK-document-31-186-1
UK-document-31-187-1
MUFON UFO Journal - 1979 12. December
UK-document-31-183-1
Phenomena Magazine - November 2010 - Issue 19