Yunak, Dmitry O.[[+period]] "Seniavski, Iosif (Jȃzeps) Aleksandrovich (1900-1964)." Encyclopedia of Seventh-day Adventists. January 29, 2020. Date of access April 02, 2020, https://phpstack-867666-4365254.cloudwaysapps.com/article?id=GGSJ.