?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=M.+ISA&rft.au=M.+ISA%2C+M.+ISA&rft.aulast=M.+ISA&rft.degree=Other&rft.title=PENENTUAN+WAKTU+DAN+BIAYA+PERBAIKAN+FILTER+LEAF+NIAGARA+FILTER+PT+KREASIJAYA+ADHIKARYA+DUMAI&rft.date=16+December+2021&rft.inst=Sekolah+Tinggi+Teknologi+Dumai&rft.tpages=3