?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Marpaung&rft.au=Marpaung%2C+Josep+L.&rft.aufirst=Josep+L.&rft.inst=Universitas+Negeri+padang&rft.date=October+2019&rft.degree=Bachelor%2FSkripsi&rft.title=Analisis+Efisiensi+Peledakan+Teknik+Top+Air+Deck+terhadap+Fragmentasi+dan+Digging+Time+Alat+Gali+Komatsu+PC+2000+pada+Pembongkaran+Overburden+di+Pit+Badak+PT+Multi+Harapan+Utama%2C+Kalimantan+Timur