RAJAGOPALAN, T. S.; RAJAN, T. N. Conventional and Non-Conventional Document Sources-Gutenberg-II-Challenge to Print Media. Journal of Information and Knowledge, [S. l.], v. 21, n. 2, p. 99–107, 1984. DOI: 10.17821/srels/1984/v21i2/49345. Disponível em: https://srels.org/index.php/sjim/article/view/49345. Acesso em: 4 mar. 2025.