Aliyan, Silmi Afina, Vera Christanti Agusta, and Ayi Syaeful Bahri. 2023. “A Analysis of Foraminifera Fossils of the Wonosari Formation and the Oyo Formation Shaping the Morphology of the Eastern Mount Sewu Karst”. BULLET : Jurnal Multidisiplin Ilmu 2 (1):216-26. https://journal.mediapublikasi.id/index.php/bullet/article/view/2290.