RANGANATHAN, S. R. Basic Subjects and their Kinds. Journal of Information and Knowledge, [S. l.], v. 5, n. 2, p. 97–133, 1968. DOI: 10.17821/srels/1968/v5i2/49186. Disponível em: https://srels.org/index.php/sjim/article/view/49186. Acesso em: 18 apr. 2025.