Bukharin's Last Plea: Transcript of Nicolai Bukharin's final plea during his trial for treason before the Supreme Court of the U.S.S.R., Moscow, March 12, Evening session, 1938.
Kolyma: The Land of Gold and Death by Stanley J. Kowalski: An account of Stalin's slave labor camp in Siberia
Modern History Sourcebook: Stalin's Purges, 1935: Text for introductory level classes.
References: good articles to read about Stalin and the Purges: Bibliographic material from Challenge-Desafio.
The Kirov Murder: It was the spark for the great purges of the 1930's. The Kirov murder was a pivotal event in Soviet History. Includes a short biography of Kirov, a description of the murder, and analysis.