?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Umi&rft.au=Widyastuti%2C+Umi&rft.aulast=Widyastuti&rft.issn=0125-9695&rft.atitle=Pengaruh+pH+Larutan+Buffer+Dan+Suhu+Penyimpanan+Terhadap+Aktivitas+Larvasida+Bacillus+sphaericus+2362&rft.title=Buletin+Penelitian+Kesehatan&rft.volume=36&rft.issue=1&rft.date=2009&rft.genre=article