@phdthesis{UNY17302,
            year = {2014},
          school = {UNIVERSITAS NEGERI YOGYAKARTA},
          author = {Nendi Ariyani},
           title = {PENGARUH MANIPULASI NITROGEN TANAH DAN DENSITAS
TANAMAN PADI TERHADAP DENSITAS GULMA DAN
MACAM GULMA PADA EKOSISTEM SAWAH},
           month = {May},
             url = {http://eprints.uny.ac.id/17302/}
}