“Development of Lkpd Nature Science With The Etno-Stem Approach to The Processing of Gambier on Additive Material at The District Junior High Shool 50 City”. Universe 5, no. 1 (July 1, 2024): 113–121. Accessed August 14, 2026. http://universe.ppj.unp.ac.id/index.php/universe/article/view/647.