https://dispendik.situbondokab.go.id/berita/ https://vta.kemenhub.go.id/assets/
Saraswati, Suprabadevi, Toruan, Lumban Nauli, AND Susetya, Ipanna. " Lead and Copper Heavy Metal Content in the Morosari Waters, Demak Region" Advances in Tropical Biodiversity and Environmental Sciences [Online], Volume 7 Number 1 (28 February 2023)