@unpublished{ITNYREPOID3781,
          author = {Listiyani Retno Astuti},
           title = {Bukti review korespondensi: Hydrochemistry of Groundwater in Yogyakarta Graben, Area of Code Sub Drainage,  Yogyakarta, Indonesia},
       publisher = {ITNY},
             url = {https://repository.itny.ac.id/id/eprint/3781/}
}