Enhancing The Achievement Of Class Iii Students Through Environmental Use As A Learning Source Of Ips In Sd Negeri 29 Koto Panjang. JIPS [Internet]. 2018 Oct. 28 [cited 2026 Jan. 13];1(3):36-45. Available from: https://e-journal.sastra-unes.com/index.php/JIPS/article/view/144