Source: https://www.afdb.org/fileadmin/uploads/afdb/Documents/Procurement/Corporate-Procurement/Lettre%20d%E2%80%99invitation%20%C3%A0%20soumissionner%20-%20Prestation%20de%20services%20de%20gardiennage%20du%20bureau%20et%20residences%20du%20staff%20de%20la%20BAD%20%C3%A0%20Libreville.pdf