?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=David+Oksa&rft.aulast=Putra&rft.au=Putra%2C+David+Oksa&rft.inst=Universitas+Negeri+Padang&rft.title=Dampak+Kerusakan+Lingkungan+Penambangan+Bijih+Besi+PT.+Royalti+Mineral+Bumi+di+Kenagarian+Pulakek%2C+Kecamatan+Pauh+Duo%2C+Kabupaten+Solok+Selatan&rft.degree=Bachelor%2FSkripsi&rft.date=August+2013