@unpublished{ITNYREPOID3264,
          author = {Winarti Winarti},
           title = {Similarity: Kontak Formasi Nanggulan Dan Andesit Tua Di G. Mujil, Kulon Progo-Yogyakarta},
       publisher = {ITNY},
             url = {https://repository.itny.ac.id/id/eprint/3264/}
}