Hoover, J. E. 1. (1957). Statement by J. Edgar Hoover, director, Federal Bureau of Investigation: To 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-fifth Congress, first session : an analysis of the sixteenth annual convention of the Communist party of the United States. Washington, D.C.: U.S. Govt. Print. Off..

Hoover, J. Edgar 1895-1972. Statement By J. Edgar Hoover, Director, Federal Bureau of Investigation: To 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-fifth Congress, First Session : An Analysis of the Sixteenth Annual Convention of the Communist Party of the United States. Washington, D.C.: U.S. Govt. Print. Off., 1957.

Hoover, J. Edgar 1895-1972. Statement By J. Edgar Hoover, Director, Federal Bureau of Investigation: To 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-fifth Congress, First Session : An Analysis of the Sixteenth Annual Convention of the Communist Party of the United States. Washington, D.C.: U.S. Govt. Print. Off., 1957.