@unpublished{ITNYREPOID3237,
          author = {Listiyani Retno Astuti},
           title = {Similarity: Chemical Type Variation Of Groundwater In Borobudur And Surroundings Area, Magelang District},
       publisher = {ITNY},
             url = {https://repository.itny.ac.id/id/eprint/3237/}
}