DE HARTYANI, Marton. P. S. Squire: The Third Department. The Establishment and Practices of the Political Police in the Russia of Nicholas I. Cambridge, At the University Press, 1968. viii + 272 s. 8 pi. 2 kort. 70 sh. Historisk Tidsskrift, [S. l.], v. 12, 1970. Disponível em: https://tidsskrift.dk/historisktidsskrift/article/view/50998. Acesso em: 6 dec. 2025.