BIRD, Keith W.; HINES, Jason. In the Shadow of Ultra: A Reappraisal of German Naval Communications Intelligence in 1914-1918. The Northern Mariner / Le marin du nord, [S. l.], v. 28, n. 2, p. 97–117, 2018. DOI: 10.25071/2561-5467.191. Disponível em: https://tnm.journals.yorku.ca/index.php/default/article/view/191. Acesso em: 23 nov. 2024.