Elisa Haddina et al. 2026. MARTBOARD-BASED INDONESIAN SIGN LANGUAGE (BISINDO) DEEP LEARNING MODEL FOR DEAF STUDENTS AT SLB PEMBINA MEDAN. Visipena. 17, 1 (Jun. 2026), 11–29. DOI:https://doi.org/10.46244/visipena.v17i1.3573.