Ina Saparlina, Iman Nurjaman. The Effect of Student Learning Outcomes Using A Tutorial Model With A Group Investigation (GI) Type Cooperative Model On The Ecosystem Concept In State High School. Elm [Internet]. 2023 Dec. 17 [cited 2024 Sep. 19];1(2):77-88. Available from: https://elementaria.my.id/index.php/e/article/view/36