Missionaries trained at the Watchtower Bible School of Gilead and, more recently, upwards of 20,000 graduates of the Ministerial Training School have made a huge contribution.
Varhumiwa lava leteriweke eka Xikolo xa Bibele xa Giliyadi xa Watchtower ni mathwasana yo tlula 20 000 ya Xikolo xa Ndzetelo wa Vutirheli lexa ha ku simekiwaka, va hoxe xandla swinene.