Lundgreen-Nielsen, Kay. “Christoph M. Kimmich: The Free City. Danzig and German Foreign Policy, 1919-1934. New Haven and London, Yale University Press, 1968. Xii+ 1965. 58 Sh”. Historisk Tidsskrift, bd. 12, januar 1971, https://tidsskrift.dk/historisktidsskrift/article/view/51308.