PUTRI, G. S.; DAMRI, D.; ISWARI, M.; KUSUMASTUTI, G.; TSAPUTRA, A. Improving the Ability to Write Natural Number Symbols (1-9) Through the Finger Numbers Media Board for Down Syndrome Students. Edumaspul: Jurnal Pendidikan, v. 8, n. 1, 1 Mar. 2024.