Ardianto, I. et al. 2018. The Role of Mining Materials in Group C Against Community Welfare In Ngawi Regency. Ekuilibrium : Jurnal Ilmiah Bidang Ilmu Ekonomi. 13, 2 (Oct. 2018), 130–144. DOI:https://doi.org/10.24269/ekuilibrium.v13i2.2018.pp130 - 144.