Effect Of Augmented Reality-Based Textbook On Geometry Spatial Ability Of Deaf Students: A-B-A SSR. Riemann: Research of Mathematics and Mathematics Education, [S. l.], v. 8, n. 1, p. 110–123, 2026. DOI: 10.38114/riemann.v8i1.196. Disponível em: https://journal.sanagustin.ac.id/index.php/reimann/article/view/196.. Acesso em: 12 may. 2026.