Bachtier, F.W. et al. 2021. The Abundance and Distribution Pattern of Echinoderms in Intertidal Zone between Sadranan and Slili Beach, Gunung Kidul, Yogyakarta: Abundance and Distribution Pattern of Echinoderms in Intertidal Zone between Sadranan and Slili Beach, Gunung Kidul, Yogyakarta. BiosciED: Journal of Biological Science and Education. 2, 2 (Dec. 2021), 52–58. DOI:https://doi.org/10.37304/bed.v2i2.2674.