AVRAM, Henriette; DE GENNARO, Richard; PULSIFER, Josephine S.; RATHER, John C.; ROSENTHAL, Joseph A.; VEANER, Allen B. Levels of Machine Readable Records. Information Technology and Libraries, [S. l.], v. 3, n. 2, p. 122–127, 1970. DOI: 10.6017/ital.v3i2.5248. Disponível em: https://ital.corejournals.org/index.php/ital/article/view/5248. Acesso em: 29 mar. 2024.