Thank you Sean, I am reading and studyig what you recommended.
After reading only thus far, I understand that the FSSPX (and I presume this community too) regards the 1969 emendments to the Roman missal, in its extraordinary form, as being legitimate liturgy while those of the novus ordo to be in error.
So, for the sole purpose of participating in the celebration of a traditional Mass, I would have to look for a post 1969, Roman missal, in Latin.
Is my deduction correct?
PS: it is remarkable how the military (the translator is a military chaplain) always have greater respect and love for traditions. I served for many years and my commander instilled in me respect for such principles to honour those who died before us to defend our same values. It is not a coincidence that Jesus did the same for us...