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 [Internet]. 1 Juli 2024 [dikutip 14 Agustus 2026];5(1):113-21. Tersedia pada: http://universe.ppj.unp.ac.id/index.php/universe/article/view/647