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Alfi Noor Istiqomah and Sigid Sudaryanto and Iswanto (2019) MODEL REWARD SYSTEM DALAM PRAKTIK ECOBRICK PADA SISWA SDN SINDUREJAN DAN SDN TAMANSARI I KOTA YOGYAKARTA. ["eprint_fieldopt_thesis_type_skripsi" not defined] thesis, Poltekkes Kemenkes Yogyakarta.