Hutagaol P. Pengaruh Model Pembelajaran Group Investigation Terhadap Hasil Belajar Siswa Pada Materi Pencemaran Lingkungan Di Kelas X SMA Negeri 2 Bandar Tahun Pelajaran 2020/2021: The Influence of the Group Investigation Learning Model on Student Learning Outcomes On Environmental Pollution Materials in Class X SMA Negeri 2 Bandar Academic Year 2020/2021. JMO [Internet]. 2021 Apr. 30 [cited 2024 May 18];3(1):40-5. Available from: https://jurnal.usi.ac.id/index.php/metabio/article/view/31