Manalu IP, Wowiling GI, Silalahi SM, Sigiro MM, Sinambela ES, Manalu A. Analisis Kualitas Udara Goa Seribu Banuarea. PISTON J.Tech.Eng [Internet]. 2023 Aug. 17 [cited 2025 Feb. 5];7(1):20-8. Available from: https://openjournal.unpam.ac.id/index.php/Piston/article/view/30159