?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=RIDHO&rft.au=RIFTANTO%2C+RIDHO&rft.aulast=RIFTANTO&rft.date=7+September+2020&rft.tpages=3&rft.title=PERANCANGAN+ALAT+KOMPOSTER+SAMPAH+ORGANIK&rft.degree=Other&rft.inst=Sekolah+Tinggi+Teknologi+Dumai