Kholidah, H., M. Arifin, and B. W. Widjajani. “WATER QUALITY POLLUTION INDEX ANALYSIS IN DOWNSTREAM OF PORONG SUB-WATERSHED, JABON DISTRICT, SIDOARJO REGENCY”. Aqusains: Jurnal Ilmu Perikanan Dan Sumberdaya Perairan, vol. 11, no. 1, Nov. 2022, pp. 1189-00, doi:10.23960/aqs.v11i1.p1189 - 1200.