BHATTACHARYYA, G. Principle of Unity of Idea in a Catalogue Code. Journal of Information and Knowledge, [S. l.], v. 5, n. 2, p. 171–181, 1968. DOI: 10.17821/srels/1968/v5i2/49192. Disponível em: https://srels.org/index.php/sjim/article/view/49192. Acesso em: 18 apr. 2025.