(1950). Communist activities among aliens and national groups: Hearings before the Subcommittee on Immigration and Naturalization of the Committee on the Judiciary, United States Senate, Eighty-first Congress, first session, on S. 1832, a bill to amend the Immigration act of October 16, 1918, as amended. Washington: U.S. Govt. Print. Off..

Communist Activities Among Aliens and National Groups: Hearings Before the Subcommittee On Immigration and Naturalization of the Committee On the Judiciary, United States Senate, Eighty-first Congress, First Session, On S. 1832, a Bill to Amend the Immigration Act of October 16, 1918, As Amended. Washington: U.S. Govt. Print. Off., 1950.

Communist Activities Among Aliens and National Groups: Hearings Before the Subcommittee On Immigration and Naturalization of the Committee On the Judiciary, United States Senate, Eighty-first Congress, First Session, On S. 1832, a Bill to Amend the Immigration Act of October 16, 1918, As Amended. Washington: U.S. Govt. Print. Off., 1950.