?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=ENRICKO+TRIAWAN&rft.au=31120009%2C+ENRICKO+TRIAWAN&rft.aulast=31120009&rft.tpages=16&rft.date=July+2018&rft.inst=Universitas+Kristen+Duta+Wacana&rft.degree=Bachelor&rft.title=KEANEKARAGAMAN+JENIS+IKAN+DI+MUARA+SUNGAI+OPAK+KABUPATEN+BANTUL%2C+PROPINSI+DAERAH+ISTIMEWA+YOGYAKARTA