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Ma’arif, M. Mudawi and Melyadi Putri, Nanda (2023) ANALISIS KUALITAS AIR SUNGAI GAJAH WONG YOGYAKARTA DENGAN METODE POLLUTION INDEX WATER QUALITY ANALYSIS OF GAJAH WONG RIVER YOGYAKARTA WITH POLLUTION INDEX METHOD. Tugas Akhir thesis, University Technology Yogyakarta.