Folks,
Re. some of the above comments concerning manuals etc. a quick check of released CIA documents showed many English language flight and maintenance manuals for the Mig-17, MiG-19 and MiG-21F.
What's interesting are the dates the CIA circulated them....
MiG-17 - 10th May 1965
MiG-19 - 15th January 1962(?) - last digit is blurred, but resembles a "2"
MiG-21F - 4th January 1963; further manual released 13th January 1967 - this latter version appears to be produced by the "Red Hats"
Link:-
https://www.cia.gov/library/readingroom/