Swinden, Greg. “Donald Collingwood, The Captain Class Frigates in the Second World War (Greg Swinden) ”. The Northern Mariner / Le marin du nord 31, no. 1 (July 16, 2021): 80–82. Accessed November 21, 2024. https://tnm.journals.yorku.ca/index.php/default/article/view/127.