?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Afif&rft.au=Afif%2C+Rido+Muhammad&rft.aufirst=Rido+Muhammad&rft.inst=Universitas+Negeri+padang&rft.date=August+2019&rft.degree=Bachelor%2FSkripsi&rft.title=Estimasi+Sumberdaya+Bijih+Besi+Menggunakan+Metode+Ordinary+Kriging+di+PT.+Gamindra+Mitra+Kesuma%2C+Kec.+Sungai+Beremas%2C+Kab.+Pasaman+Barat%2C+Sumatera+Barat