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Feby Melanie; Ruri Prihatini Lubis; Dasar Martinus Sembiring; Said Iqbal Zaini; Sahri Muda; Rudi Iskandar; Ade Farnan Saragih; Suangro L.H. Sitanggang. ANALYSIS OF FACTORS CAUSING THE LOW SUBSCRIPTION LEVEL OF PDAM TIRTA SARI IN BINJAI CITY. BESTI 2026, 3, 609-616.