?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ratnawulan&rft.au=Ratnawulan%2C+Ratnawulan&rft.aufirst=Ratnawulan&rft.pages=8332-8339&rft.atitle=Synthesis+and+Characterization+Hausmannite+(Mn%E2%82%83O%E2%82%84)+Nanoparticle+of+Manganese+Ores+Prepared+by+High-Energy+Milling&rft.date=2020&rft.issue=3&rft.issn=2005-4238&rft.title=International+Journal+of+Advanced+Science+and+Technology&rft.volume=29&rft.genre=article