Heidbrink, Ingo. “J. W. Richardson, In The Treacle Mine, the Life of a Marine Engineer by Ingo Heidbrink”. The Northern Mariner / Le marin du nord 33, no. 2 (April 19, 2024): 316–318. Accessed September 8, 2024. https://tnm.journals.yorku.ca/index.php/default/article/view/1152.