FEDERICO, B. The velocity of P-waves below the " 20" discontinuity ". Annals of Geophysics, [S. l.], v. 28, n. 1, p. 45–63, 1975. DOI: 10.4401/ag-4890. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4890. Acesso em: 19 may. 2024.