KUALITAS AIR SUMUR DITINJAU DARI KEBERADAAN Escherichia coli (STUDI KASUS DESA STUNGKIT KECAMATAN BINGAI). International Healthy and Prosperous Family Journal [Internet]. 2016 May 10 [cited 2026 Mar. 15];12(1). Available from: https://jurnal.unimed.ac.id/2012/index.php/jkss/article/view/3571