The Dictators: Hitler's Germany, Stalin's Russia. W. W. Norton Company, Inc. ISBN 9780141912240. ↑ Pogroms in the Ukraine (1919–1921) Online Encyclopedia of Mass Violence, April 3, 2008, retrieved September 9, 2015. ↑ Russian Civil War Pogroms Zionism and Israel – Encyclopedic Dictionary, 2005, retrieved September 9, 2015.