“BIANNUAL MONTHLY CHANGES OF SEA SLUDGE COMPOSITION FROM HIDAKA PORT, WAKAYAMA, JAPAN ”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 19, no. 76, pp. 1–8, Dec. 2020, Accessed: May 08, 2026. [Online]. Available: https://geomatejournal.com/geomate/article/view/809