?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Efendi%2C+Nur&rft.aufirst=Nur&rft.aulast=Efendi&rft.date=17+January+2025&rft.title=Sebaran+Getaran+Peledakan+Pertambangan+Batubara&rft.inst=Universitas+Negeri+Padang&rft.degree=Doctoral%2FDisertasi