Sevaldsen, J. (1977) “Christopher Howard: Britain and the Casus Belli 1822-1902. A study of Britain’s international position from Canning to Salisbury. The Athlone Press, London, 1974. £ 4.00”., Historisk Tidsskrift, 13. Tilgængelig hos: https://tidsskrift.dk/historisktidsskrift/article/view/51874 (Set: 6 december 2025).