https://www.cia.gov/library/readingroom/docs/CIA-RDP88-01314R000100360004-2.pdf
https://www.cia.gov/library/readingroom/docs/CIA-RDP04-00312R001001800019-4.pdf
https://www.cia.gov/library/readingroom/docs/CIA-RDP88-01314R000100360004-2.pdf
https://www.cia.gov/library/readingroom/docs/CIA-RDP04-00312R001001800019-4.pdf