Manalu, Istas Pratomo, Gerry Italiano Wowiling, Sari Muthia Silalahi, Marojahan Mula Sigiro, Eka Stephani Sinambela, and Andriono Manalu. “Analisis Kualitas Udara Goa Seribu Banuarea”. Piston: Journal of Technical Engineering 7, no. 1 (August 17, 2023): 20–28. Accessed February 5, 2025. https://openjournal.unpam.ac.id/index.php/Piston/article/view/30159.