KARP, A. On Studying Old Textbooks. Journal of Mathematics Education at Teachers College, [S. l.], v. 15, n. 2, p. 1–4, 2024. DOI: 10.52214/jmetc.v15i2.13203. Disponível em: https://journals.library.columbia.edu/index.php/jmetc/article/view/13203. Acesso em: 5 dec. 2025.