Marsidi, Dafik, Susanto, Kristiana AI. The Development of RBL-STEM Learning Materials to improve Students’ Combinatorial Thinking Skills in Solving DNA Protection Problems. International Journal of Instruction [Internet]. 2025 Jul. 2 [cited 2025 Jul. 3];18(3):409-34. Available from: https://e-iji.net/ats/index.php/pub/article/view/783