Source: https://www.afdb.org/fileadmin/uploads/afdb/Documents/Project-and-Operations/Cameroun_-_Projet_d%E2%80%99appui_aux_Infrastructures_rurales_et_au_d%C3%A9veloppement_participatif_de_Grassfield-Phase_II__Grassfield_II__-_Rapport_d_%C3%A9valuation.pdf