RT null T1 Formalization and legalization of artisanal and small-scale mining in Nigeria A1 Global Mercury Partnership, A2 Uka, Charles K1 artisan YR 2011 FD 2011 LK https://wedocs.unep.org/handle/20.500.11822/12742 UL https://wedocs.unep.org/handle/20.500.11822/12742 NO Formalization and legalization of artisanal and small-scale mining in Nigeria NO https://www.unep.org/chemicalsandwaste/Portals/9/Mercury/Documents/ASGM/Nigeria/Presentations/formalization/UKA_FORMALIZATION%20AND%20LEGALIZATION%20OF%20ARTISANAL%20AND%20SMALL-SCALE%20MINING%20IN%20NIGERIA.ppt DS UN Environment Document Repository RD Sep 16, 2026