Oktavia, R., Iswari, R. and Alimah, S. 2020. A Research Based Of Supplementary Book in Tapak Tugurejo as Students’ Learning Resource on Mangrove Ecosystem Materials. Journal of Innovative Science Education. 9, 1 (Apr. 2020), 77 - 85. DOI:https://doi.org/10.15294/jise.v8i1.32795.