Ningthias, D. P., Hidayanti, E., Anwar, Y. A. S., Listantia, N., Firmansyah, D., & Sugondo, B. V. O. (2026). Validation of Ethnochemistry-Integrated Two-Tier Items for Chemical Literacy among Pre-service Chemistry Teachers. Hydrogen: Jurnal Kependidikan Kimia, 14(1), 33–42. https://doi.org/10.33394/hjkk.v14i1.19581