?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Jeffern+Cornelis&rft.au=31150024%2C+Jeffern+Cornelis&rft.aulast=31150024&rft.date=July+2019&rft.tpages=21&rft.title=LOGAM+BERAT+TIMBAL+(Pb)+DALAM+PAKAN+DAN+DAGING+UNGGAS%2C+IKAN+DAN+UDANG&rft.degree=Bachelor&rft.inst=Universitas+Kristen+Duta+Wacana