See Appendix A3 in the revised New World Translation; also A Book for All People, pp. 7 - 9, “How Did the Book Survive? ”
اُنْظُرِ ٱلْمُلْحَقَ A3 فِي تَرْجَمَةِ ٱلْعَالَمِ ٱلْجَدِيدِ ،‏ ٱلطَّبْعَةِ ٱلْإِنْكِلِيزِيَّةِ ٱلْمُنَقَّحَةِ ،‏ وَ كِتَابٌ لِكُلِّ ٱلنَّاسِ ،‏ ٱلْجُزْءَ بِعُنْوَانِ «‏ كَيْفَ بَقِيَ ٱلْكِتَابُ ؟‏‏ » ،‏ ٱلصَّفَحَاتِ ٧ -‏ ٩ .‏