Klobas, Mark. “John Darwin, Unlocking the World: Port Cities and Globalization in the Age of Steam, 1830-1930 (Mark Klobas)”. The Northern Mariner / Le marin du nord 31, no. 1 (July 16, 2021): 89–91. Accessed May 5, 2024. https://tnm.journals.yorku.ca/index.php/default/article/view/132.