Ipa, Sangaji Hasmi Maharani, Siti Hadjar Kubangun, Satria Bijaksana, Darharta Dahrin, and Innaa Uswatun Hasanah. 2018. “Characterization of Magnetic Properties of the Coastal Sand Deposits in South Beach of Manokwari, West Papua”. Journal of Natural Sciences and Mathematics Research 4 (2):33-40. https://journal.walisongo.ac.id/index.php/JNSMR/article/view/11016.