https://www.psptb.go.tz/administration/board-of-directors/oscar-e-mangula
Adv. Oscar E. Mangula | PSPTB - Bodi ya Wataalam wa Ununuzi na Ugavi
Procurement and Supplies Professionals and Technicians Board | Bodi ya Wataalamu na Mafundi wa Ununuzi na Ugavi
oscar e