?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Putra&rft.au=Putra%2C+Teguh+Indra&rft.aufirst=Teguh+Indra&rft.inst=Universitas+Negeri+padang&rft.date=November+2018&rft.degree=Bachelor%2FSkripsi&rft.title=Optimalisasi+Mixer+dan+Maxijet+untuk+Development+Ground+Support+pada+Tambang+Grasberg+Block+Cave+(GBC)+PT.+Freeport+Tembagapura%2C+Papua