See B. Chapman, Police State (1970); P. S. Deriabin, Watchdogs of Terror (1972); B. Levytski, The Uses of Terror (tr. 1972); C. Perkus, ed., Cointelpro (1976); F. Taylor and M. Van Houten, Counterintelligence: A Documentary Look at America's Secret Police (1978); W. Churchill and J. Vander Wall, Agents of Repression: The FBI's Secret Wars (1990); Y. Albats, The State within a State (1994); A. Knight, Spies without Cloaks (1996); C. Andrew and V. Mitrokhin, The Sword and the Shield (1999).
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.