Madsen C. J.E. Kaufmann and H.W. Kaufmann, Fortress Europe: From Stone to Steel Fortifications 1850-1945 by Chris Madsen. TNM [Internet]. 2023 Jul. 27 [cited 2024 Nov. 21];33(1):114-7. Available from: https://tnm.journals.yorku.ca/index.php/default/article/view/1099