Khokhlov, N. E. (1954). Activities of Soviet Secret Service (Testimony of Nikolai Evgeniyevich Khokhlov, former MGB Agent): Hearing before the Subcommittee To Investigate the Administration of the Internal Security Act and Other Internal Security Laws of the Committee on the Judiciary, United States Senate, Eighty-Third Congress, second session on activities of Soviet Secret Service, May 21, 1954. Washington, D.C.: United States Government Printing Office.

Khokhlov, Nikolai E. Activities of Soviet Secret Service (Testimony of Nikolai Evgeniyevich Khokhlov, Former MGB Agent): Hearing Before the Subcommittee To Investigate the Administration of the Internal Security Act and Other Internal Security Laws of the Committee On the Judiciary, United States Senate, Eighty-Third Congress, Second Session On Activities of Soviet Secret Service, May 21, 1954. Washington, D.C.: United States Government Printing Office, 1954.

Khokhlov, Nikolai E. Activities of Soviet Secret Service (Testimony of Nikolai Evgeniyevich Khokhlov, Former MGB Agent): Hearing Before the Subcommittee To Investigate the Administration of the Internal Security Act and Other Internal Security Laws of the Committee On the Judiciary, United States Senate, Eighty-Third Congress, Second Session On Activities of Soviet Secret Service, May 21, 1954. Washington, D.C.: United States Government Printing Office, 1954.