Pratama, M.Y., Kuntjoro, S. and Asri, M.T. 2024. E-Book on Ethno-conservation of Agricultural Land for Teaching Students’ Critical Thinking Skills in Sidoarjo-Indonesia. IJORER : International Journal of Recent Educational Research. 5, 4 (Jul. 2024), 935-944. DOI:https://doi.org/10.46245/ijorer.v5i4.626.