NORTH, R. G. The Canadian National Seismograph Network. Annals of Geophysics, [S. l.], v. 37, n. 5, 1994. DOI: 10.4401/ag-4193. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4193. Acesso em: 30 apr. 2024.