"UFP Encounter II Sample Case Selected by the UFO Subcommittee of the AIAA"
www.cia. gov/library/readingroom/docs/CIA-RDP81R00560R000100010010-0.pdf
"UFP Encounter II Sample Case Selected by the UFO Subcommittee of the AIAA"
www.cia. gov/library/readingroom/docs/CIA-RDP81R00560R000100010010-0.pdf