Bolotenko, George. “The National Archives and Left-Wing Sources from Russia: Records of the Mackenzie-Papineau Battalion, the Communist Party of Canada and Left-Wing Internationals”. Labour / Le Travail 37 (January 1, 1996): 179–203. Accessed May 5, 2024. https://www.lltjournal.ca/index.php/llt/article/view/5031.