For additional information, see The Watchtower of October 15, 1988, pages 25 - 9; November 15, 1988, pages 21 - 4; and September 1, 1996, pages 30 - 1.
Lisainfot leiad „Vahitornidest ”, 15. oktoober 1988, lk 25 – 29; 15. november 1988, lk 21 – 24 (mõlemad inglise keeles), ja 1. september 1996, lk 30 – 31.