Pujiastuti, C. .-., Muljani, S. and Sumada, K. (2023) “Precipitated calcium oxide nanosize from limestone and blood clam shells”, Journal of Natural Sciences and Mathematics Research, 9(1), pp. 12–18. Available at: https://journal.walisongo.ac.id/index.php/JNSMR/article/view/13209 (Accessed: 15 June 2025).