of his activities by Congress in that year. Death and legacy Nicholas Dozenberg died in Florida of Parkinson's disease in 1954. See also GRU —The Soviet military intelligence agency, Glavnoe Razvedyvatel'noe Upravleniе, "Main Intelligence Directorate." Footnotes Congressional testimony House Committee on Un-American Activities, Investigation of Un-American Propaganda Activities in the United States: Volume 13. Washington: US Government Printing Office, 1940; pp. 8137–8161. —Public testimony of May 20, 1940. House Committee on Un-American Activities, Investigation of Un-American Propaganda Activities in the United States: Executive Hearings, Volume 2. Washington: US Government Printing Office, 1941; pp. 563–653. —Executive Session testimony of May 21, 1940. House Committee on Un-American Activities, Hearings Regarding Communist Espionage, 81st Congress, Nov. 8, 1949. Washington: US Government Printing Office, 1951; pp. 3540–3542. —Written statement of October 4, 1949. Further reading Nicholas Dozenberg, "Letter to Alexander Trachtenberg, June 19, 1924." Corvallis, OR: 1000 Flowers Publishers, 2010. Letter written as head of Workers Party of America's Literature Department. John Earl Haynes and Harvey Klehr, Venona: Decoding Soviet Espionage in America. New Haven, CT: Yale University Press, 1999. John Earl Haynes, Harvey Klehr, and Alexander Vassiliev, Spies: The Rise and Fall of the KGB in America. New Haven, CT: Yale University Press, 2009. External links Nicholas Dozenberg website, NicholasDozenberg.com —Large memorial site maintained by the blood Dozenberg family. Nicholas Dozenberg website, Dozenberg.com —Small memorial site maintained by the Dozenberg family. Svetlana Chervonnaya, "Nicholas Dozenberg (1882-1954)," DocumentsTalk.com, Moscow. 1882 births 1954 deaths Machinists American socialists Members of the Socialist Party of America American Marxists Members of the Communist Party USA Federal Bureau of Investigation informants American spies for the Soviet Union Emigrants from the Russian Empire to the United States International Association of Machinists and Aerospace Workers people Massachusetts socialists