McKee, Fraser. “Geirr H. Haarr, No Room For Mistakes. British And Allied Submarine Warfare 1939-1940 by Fraser McKee”. The Northern Mariner / Le marin du nord 32, no. 1 (November 1, 2022): 78–79. Accessed December 22, 2024. https://tnm.journals.yorku.ca/index.php/default/article/view/926.