Ratang S. Public Perception toward the Impact of People Activities in Sand and Stone Mining on Economy and Environment in Nulokla Village Jayapura. JEVR [Internet]. 2017 Sep. 28 [cited 2026 Oct. 25];8(2):45-8. Available from: https://amhinternational.com/jevr/article/view/4581-public-perception-toward-the-impact-of-people-activities-in-sand-and-stone-mining-on-economy-and-environment-in-nulokla-village-jayapura