Wiwik, W., Rambitan, V. M. and subagiyo, L. (2018) “Problem Analysis in the Development Needs of the Problem Based Learning and Discovery Learning Integrated Learning Model Tools Biology Concept Improvement of Students at SMA Negeri 1 Samarinda”, BIODIK, 4(1), pp. 26 - 35. doi: 10.22437/bio.v4i1.5506.